Vision: Most Popular Articles
These articles are the most popular over the last month.
Eye Styes
A stye is a common eye problem. Learn about the causes and treatment of eye styes.
A stye is a common eye problem. Learn about the causes and treatment of eye styes.
Eye Twitching
Eye twitching, or myokymia, is an involuntary eyelid muscle contraction. The exact cause of an eyelid twitch is not known. A twitch sometimes develops during times of increased stress.
Eye twitching, or myokymia, is an involuntary eyelid muscle contraction. The exact cause of an eyelid twitch is not known. A twitch sometimes develops during times of increased stress.
Red Eye
Red, bloodshot eyes can be caused by many things. Here are the top 10 causes of red eye.
Red, bloodshot eyes can be caused by many things. Here are the top 10 causes of red eye.
Eye Problems
Learn about common eye problems including itchy eyes, blurry vision, tired eyes, floaters and age-related conditions.
Learn about common eye problems including itchy eyes, blurry vision, tired eyes, floaters and age-related conditions.
Baby Eye Color
A baby's eye color is determined by the amount of pigment contained in the iris.
A baby's eye color is determined by the amount of pigment contained in the iris.
Conjunctivitis
Learn all about pink eye and ways to keep it from spreading.
Learn all about pink eye and ways to keep it from spreading.
Spots and Floaters
Eye spots and floaters are small particles in the fluid inside your eye.
Eye spots and floaters are small particles in the fluid inside your eye.
Blepharitis
Blepharitis is a common condition affecting the eyelids. It is a common problem in both children and adults.
Blepharitis is a common condition affecting the eyelids. It is a common problem in both children and adults.
Stop Eye Twitching
Learn ways to control eye twitching.
Learn ways to control eye twitching.
Astigmatism
Astigmatism, commonly mistaken as stigmatism, is a vision disorder that causes objects to be blurry, both at distance and at near.
Astigmatism, commonly mistaken as stigmatism, is a vision disorder that causes objects to be blurry, both at distance and at near.
Choose the Best Frames
Choosing the right eyeglasses for your face. Determine the shape of your face and choose the most flattering frame styles.
Choosing the right eyeglasses for your face. Determine the shape of your face and choose the most flattering frame styles.
Pupils Stay Dilated?
After an eye examination, how long will my pupils remain dilated?
After an eye examination, how long will my pupils remain dilated?
Emergency Symptoms
Many eye conditions are minor and temporary. However, these four symptoms require a doctor's immediate attention.
Many eye conditions are minor and temporary. However, these four symptoms require a doctor's immediate attention.
Snellen Eye Chart
A Snellen eye chart is the eye chart used by your eye doctor to check vision acuity.
A Snellen eye chart is the eye chart used by your eye doctor to check vision acuity.
Eye Drops With Contacts?
Can "get the red out" eye drops be used with contact lenses?
Can "get the red out" eye drops be used with contact lenses?
Cost of Contacts
Several factors determine the overall cost of wearing contact lenses.
Several factors determine the overall cost of wearing contact lenses.
Special Contacts
Decorative contact lenses have become quite popular in recent years, with demand increasing during the Halloween season. Special effect contact lenses are available with or without corrective power, so people who don't usually need contact lenses or glasses may still wear them.
Decorative contact lenses have become quite popular in recent years, with demand increasing during the Halloween season. Special effect contact lenses are available with or without corrective power, so people who don't usually need contact lenses or glasses may still wear them.
Glaucoma
Glaucoma refers to a group of diseases that cause damage to the optic nerve. If left untreated, glaucoma may cause vision loss and blindness.
Glaucoma refers to a group of diseases that cause damage to the optic nerve. If left untreated, glaucoma may cause vision loss and blindness.
Eye Examination Tests
A comprehensive eye exam includes several tests. Each test will help your eye doctor determine the overall health of your eyes.
A comprehensive eye exam includes several tests. Each test will help your eye doctor determine the overall health of your eyes.
PVD
Posterior vitreous detachment is a common condition in people over age 65.
Posterior vitreous detachment is a common condition in people over age 65.
Which Eye Is Dominant?
This quick test will determine eye dominance. Find your dominant eye.
This quick test will determine eye dominance. Find your dominant eye.
What Is Monovision?
My eye doctor offered to fit me with monovision contact lenses. What is monovision?
My eye doctor offered to fit me with monovision contact lenses. What is monovision?
Before You Get Contacts
Are you thinking of trying contact lenses? Learn the pros and cons of wearing contact lenses.
Are you thinking of trying contact lenses? Learn the pros and cons of wearing contact lenses.
The Basics of Nearsightedness
Nearsightedness is a common vision problem. Nearsightedness causes distant objects to be blurry.
Nearsightedness is a common vision problem. Nearsightedness causes distant objects to be blurry.
Vision 101 Quiz
Test your knowledge of basic vision.
Test your knowledge of basic vision.
Lens Options
Eyeglass lenses can be made from several different materials. Find out which lens material is best for your next pair of frames.
Eyeglass lenses can be made from several different materials. Find out which lens material is best for your next pair of frames.
Black Eye Treatment
A black eye is a common result of an injury to the face or head.
A black eye is a common result of an injury to the face or head.
Clean Glasses
Learn how to clean your eyeglasses the correct way to prolong the life of your eyeglasses and lenses.
Learn how to clean your eyeglasses the correct way to prolong the life of your eyeglasses and lenses.
Dry Eye Syndrome
If you have scratchy, dry eyes, you may suffer from dry eye syndrome. Learn how to treat dry eye symptoms.
If you have scratchy, dry eyes, you may suffer from dry eye syndrome. Learn how to treat dry eye symptoms.
Hyphema
Hyphema refers to the presence of blood in the eye, usually caused by trauma to the eye.
Hyphema refers to the presence of blood in the eye, usually caused by trauma to the eye.
Color Blindness
Color blind people have problems distinguishing between certain colors, usually red and green.
Color blind people have problems distinguishing between certain colors, usually red and green.
Infant's First Eye Exam
The American Optometric Association (AOA) encourages parents to include a trip to the optometrist in the list of well-baby check-ups. Here is what to expect.
The American Optometric Association (AOA) encourages parents to include a trip to the optometrist in the list of well-baby check-ups. Here is what to expect.
How to Buy Eyeglasses
The following steps will help you find the perfect eyeglasses to fit your look and lifestyle.
The following steps will help you find the perfect eyeglasses to fit your look and lifestyle.
Lens Options for Presbyopia
Several lens options exist for correcting presbyopia, or the blurring of our vision that happens as we age.
Several lens options exist for correcting presbyopia, or the blurring of our vision that happens as we age.
Reasons for Eye Exam
Vision care is often neglected. Here are 5 reasons to schedule an eye examination today.
Vision care is often neglected. Here are 5 reasons to schedule an eye examination today.
20/20 Vision
The smallest line you can read on a chart is your visual acuity. Perfect visual acuity is written as 20/20.
The smallest line you can read on a chart is your visual acuity. Perfect visual acuity is written as 20/20.
Eye Inflammation
It may sound like a condition caused by the sun's UV rays, but uveitis is actually an inflammation or swelling of the eye's uvea.
It may sound like a condition caused by the sun's UV rays, but uveitis is actually an inflammation or swelling of the eye's uvea.
Lazy Eye
Lazy eye, or amblyopia, is an eye problem that sometimes occurs in chldren. Learn facts and treatment options for amblyopia.
Lazy eye, or amblyopia, is an eye problem that sometimes occurs in chldren. Learn facts and treatment options for amblyopia.
Habits for Good Eyesight
Having good eye sight greatly improves one's quality of life. Make a conscious effort to keep your eyes in their best condition by following these quick tips.
Having good eye sight greatly improves one's quality of life. Make a conscious effort to keep your eyes in their best condition by following these quick tips.
CVS
If you spend a lot of time each day in front of a computer, you are likely to experience symptoms of computer vision syndrome (CVS).
If you spend a lot of time each day in front of a computer, you are likely to experience symptoms of computer vision syndrome (CVS).
Ptosis
Droopy eyelids is known as ptosis.
Droopy eyelids is known as ptosis.
Dilation
Why do eye doctors dilate the eyes?
Why do eye doctors dilate the eyes?
Vision 101
Knowledge of vision principles improves overall visual and ocular health.
Knowledge of vision principles improves overall visual and ocular health.
Newborn Vision
Your newborn baby gazes at you, but what does he really see?
Your newborn baby gazes at you, but what does he really see?
Retinal Detachment
Retinal detachment is when the retina separates from the choroid. Retinal detachment is a true eye emergency.
Retinal detachment is when the retina separates from the choroid. Retinal detachment is a true eye emergency.
Myokymia
An involuntary eyelid muscle contraction, typically involving the lower eyelid, less often the upper eyelid.
An involuntary eyelid muscle contraction, typically involving the lower eyelid, less often the upper eyelid.
Basics of Farsightedness
Symptoms and treatment of farsightedness, or hyperopia.
Symptoms and treatment of farsightedness, or hyperopia.
Contact Lenses
Learn facts and tips about contact lenses. Find out if contacts are for you.
Learn facts and tips about contact lenses. Find out if contacts are for you.
Minimize Eye Infection
Properly caring for your lenses can prevent serious eye infections, some that could even cause blindness. Below are the top 10 ways for contact lens users to minimize the chance of developing an eye infection.
Properly caring for your lenses can prevent serious eye infections, some that could even cause blindness. Below are the top 10 ways for contact lens users to minimize the chance of developing an eye infection.
Contacts and Allergies
Contact lenses tend to cause problems for people with allergies. Here are five tips to help you get through the season with happy eyes.
Contact lenses tend to cause problems for people with allergies. Here are five tips to help you get through the season with happy eyes.
Diabetic Retinopathy
Diabetic retinopathy is a common complication of diabetes. It may cause poor vision or even blindness.
Diabetic retinopathy is a common complication of diabetes. It may cause poor vision or even blindness.
Sun Protection
Learn how to protect your eyes from the sun. Exposure to UV radiation can harm your eyes and affect your vision.
Learn how to protect your eyes from the sun. Exposure to UV radiation can harm your eyes and affect your vision.
Eye Exam Schedules
Early detection of eye and vision problems is key in maintaining healthy sight. Find out how often it is recommended to have a comprehensive eye exam.
Early detection of eye and vision problems is key in maintaining healthy sight. Find out how often it is recommended to have a comprehensive eye exam.
Vision Development
Learn how a child's vision develops throughout the first year of life.
Learn how a child's vision develops throughout the first year of life.
Red Eye Warning Symptoms
If you have red eye, look out for the following warning symptoms that may be serious.
If you have red eye, look out for the following warning symptoms that may be serious.
Cataracts Symptoms & Treatment
A cataract is a clouding of the eye's lens, which occurs with aging. The symptoms are sometime bothersome and require treatment
A cataract is a clouding of the eye's lens, which occurs with aging. The symptoms are sometime bothersome and require treatment
Signs Your Child Needs Glasses
Many children have undetected vision problems. Parents and teachers must watch for obvious signs that a child might need glasses.
Many children have undetected vision problems. Parents and teachers must watch for obvious signs that a child might need glasses.
Teens and Contacts
If you are considering allowing your teenager to wear contacts, here are a few things to think about.
If you are considering allowing your teenager to wear contacts, here are a few things to think about.
Macular Degeneration
Macular degeneration, or age-related macular degeneration, is the leading cause of blindness in older people.
Macular degeneration, or age-related macular degeneration, is the leading cause of blindness in older people.
LASIK Reasons
Laser vision correction is not for everyone. Find out if you are qualified to be a laser surgery candidate.
Laser vision correction is not for everyone. Find out if you are qualified to be a laser surgery candidate.
Foreign Object removal
Follow these tips if you have a foreign object in your eye.
Follow these tips if you have a foreign object in your eye.
Disposable Contacts
Disposable contacts are made to be worn for a period of time, then thrown out and replaced with a new pair of lenses. Try colored disposables for fun.
Disposable contacts are made to be worn for a period of time, then thrown out and replaced with a new pair of lenses. Try colored disposables for fun.
Store Lenses in Water?
Can contacts be stored in plain water?
Can contacts be stored in plain water?
Signs of Glaucoma
Learn the signs and symptoms of glaucoma.
Learn the signs and symptoms of glaucoma.
Eye Allergies
Red, itchy, watery eyes plague many people suffering from irritating eye allergies.
Red, itchy, watery eyes plague many people suffering from irritating eye allergies.
Dry Eye Symptoms
Dry eye, or dry eye syndrome, is a common eye condition that causes discomfort due to lack of moisture in the eyes. Below are the top seven signs and symptoms of dry eye.
Dry eye, or dry eye syndrome, is a common eye condition that causes discomfort due to lack of moisture in the eyes. Below are the top seven signs and symptoms of dry eye.
Accommodative spasm
An accommodative spasm is a condition that causes the eye muscle to accommodate constantly and automatically. This means that the eye muscle is constantly triggerd to relax and to exert.
An accommodative spasm is a condition that causes the eye muscle to accommodate constantly and automatically. This means that the eye muscle is constantly triggerd to relax and to exert.
Strabismus
Strabismus is the term is used to describe eyes that are not straight or properly aligned. It is a deviation of the eyes.
Strabismus is the term is used to describe eyes that are not straight or properly aligned. It is a deviation of the eyes.
Cost of LASIK
How much does LASIK cost?
How much does LASIK cost?
How Long for Contact Lenses?
Can two-week disposable lenses be worn longer than two weeks?
Can two-week disposable lenses be worn longer than two weeks?
Presbyopia
Presbyopia is defined as the loss of the eye's ability to change focus to see near objects. Presbyopia, or "short-armed syndrome", decreases our ability to focus on near objects. Presbyopia is a vision disorder that develops as we age.
Presbyopia is defined as the loss of the eye's ability to change focus to see near objects. Presbyopia, or "short-armed syndrome", decreases our ability to focus on near objects. Presbyopia is a vision disorder that develops as we age.
Children's Eyeglasses
Need to buy your child a pair of eyeglasses? Here is what to look for.
Need to buy your child a pair of eyeglasses? Here is what to look for.
Myopia Control
Myopia control is the term given to different methods that try to influence vision and brain development, or alter the growth of the eye itself to retain clear eyesight.
Myopia control is the term given to different methods that try to influence vision and brain development, or alter the growth of the eye itself to retain clear eyesight.
Newborns and Crossed Eyes
Crossed eyes are normal in newborn infants, as the entire visual system is underdeveloped.
Crossed eyes are normal in newborn infants, as the entire visual system is underdeveloped.
Toddler to Wear Sunglasses
Learn ways to keep sunglasses on a squirmy toddler.
Learn ways to keep sunglasses on a squirmy toddler.
Makeup and Contact Lenses
Many people wonder if they can wear makeup when they wear their contact lenses. Find out if you need to ditch your cosmetics or change your makeup regimen now that you're wearing contact lenses.
Many people wonder if they can wear makeup when they wear their contact lenses. Find out if you need to ditch your cosmetics or change your makeup regimen now that you're wearing contact lenses.
Replacing Contact Lens Cases
How often should contact lens storage cases be replaced?
How often should contact lens storage cases be replaced?
Ordering Contacts Online
Remember that contact lenses are medical devices that should be properly fitted and cared for to maintain healthy eyes and vision. Follow the guidelines below when ordering contact lenses online.
Remember that contact lenses are medical devices that should be properly fitted and cared for to maintain healthy eyes and vision. Follow the guidelines below when ordering contact lenses online.
Is LASIK Permanent?
I've heard a lot about LASIK laser eye surgery. Are the results achieved from LASIK surgery permanent?
I've heard a lot about LASIK laser eye surgery. Are the results achieved from LASIK surgery permanent?
Vision After LASIK
Will I be able to see clearly at a distance after LASIK?
Will I be able to see clearly at a distance after LASIK?
Sports Injuries
Sports and recreational activities cause more than 40,000 eye injuries each year, most of which could be prevented.
Sports and recreational activities cause more than 40,000 eye injuries each year, most of which could be prevented.
Prevent CVS in Children
Many children work at a computer each day. Sitting in front of a computer screen for prolonged periods of time may cause the eyes to strain.
Many children work at a computer each day. Sitting in front of a computer screen for prolonged periods of time may cause the eyes to strain.
Double Vision
Seeing double? The medical term for double vision is diplopia. Double vision occurs if the two eyes are misaligned and are aimed at two different targets.
Seeing double? The medical term for double vision is diplopia. Double vision occurs if the two eyes are misaligned and are aimed at two different targets.
Baby Eye Care
Learn how to keep your baby's eyes clean and healthy.
Learn how to keep your baby's eyes clean and healthy.
Retinitis Pigmentosa
Retinitis pigmentosa (RP) refers to a group of inherited eye diseases that affect the retina. In retinitis pigmentosa, patients experience progressive vision loss.
Retinitis pigmentosa (RP) refers to a group of inherited eye diseases that affect the retina. In retinitis pigmentosa, patients experience progressive vision loss.
Myopia
Myopia simulation.
Myopia simulation.
Protect Eyes from Sun
Harmful ultraviolet (UV) rays can cause sunburn of both the skin and the cornea of the eye, even on an overcast day, according to the American Optometric Association.
Harmful ultraviolet (UV) rays can cause sunburn of both the skin and the cornea of the eye, even on an overcast day, according to the American Optometric Association.
Safest Kids Lenses
When choosing eyeglasses for your child, safety should be your first priority.
When choosing eyeglasses for your child, safety should be your first priority.
Ophthalmoscope Definition
Definition of ophthalmoscope.
Definition of ophthalmoscope.
Seeing Stars
"Seeing stars" may result from a sneeze, a deep cough, a blow to the head or low blood pressure.
"Seeing stars" may result from a sneeze, a deep cough, a blow to the head or low blood pressure.
Video Games and Eyestrain
Playing video games for extended amounts of time can lead to eye discomfort, fatigue, blurred vision and headaches.
Playing video games for extended amounts of time can lead to eye discomfort, fatigue, blurred vision and headaches.
Glaucoma Risk Factors
Glaucoma is a leading cause of vision loss that sometimes goes undetected. Are you at risk for glaucoma?
Glaucoma is a leading cause of vision loss that sometimes goes undetected. Are you at risk for glaucoma?
Iris
The iris is the colored part of the eye.
The iris is the colored part of the eye.
Risk Factors for Macular Degen
It is possible to develop macular degeneration with or without the risk factors listed here. However, the more risk factors you have, the greater your risk of developing the disease.
It is possible to develop macular degeneration with or without the risk factors listed here. However, the more risk factors you have, the greater your risk of developing the disease.
Glaucoma Simulation
Glaucoma simulation.
Glaucoma simulation.
Floaters Definition
Definition of floaters.
Definition of floaters.
Mac Degen
Macular degeneration simulation.
Macular degeneration simulation.
RP
Retinitis pigmentosa simulation.
Retinitis pigmentosa simulation.
Toric Lenses
Toric lenses are lenses are worn to correct astigmatism.
Toric lenses are lenses are worn to correct astigmatism.
Blocked Tear Ducts
Blocked tear ducts are common in infants.
Blocked tear ducts are common in infants.
Cataract
Cataract simulation.
Cataract simulation.
Foreign Object Removal
Follow these recommendations if you have a foreign object in your eye.
Follow these recommendations if you have a foreign object in your eye.
Glaucoma Tests
Descriptions of the six tests used to detect the eye disease known as glaucoma.
Descriptions of the six tests used to detect the eye disease known as glaucoma.
Top 7 Risks of Laser Surgery
Refractive surgery often produces great results. However, there are risks involved in any medical procedure. If you are considering undergoing laser vision surgery, it is important to know the possible complications and limitations that may occur.
Refractive surgery often produces great results. However, there are risks involved in any medical procedure. If you are considering undergoing laser vision surgery, it is important to know the possible complications and limitations that may occur.
Asthenopia
Asthenopia is a collection of symptoms that causes eye fatigue or tiredness.
Asthenopia is a collection of symptoms that causes eye fatigue or tiredness.
Blocked Tear Duct Treatment
If a blocked tear duct is discovered early enough, treatment is usually simple, and infection can usually be avoided.
If a blocked tear duct is discovered early enough, treatment is usually simple, and infection can usually be avoided.
Photokeratitis
A burn of the cornea (the clear front surface of the eye) by ultraviolet rays.
A burn of the cornea (the clear front surface of the eye) by ultraviolet rays.
Optic Nerve - Toxic amblyopia
Toxic amblyopia is reduced vision believed to be due to a toxic reaction in the optic nerve.
Toxic amblyopia is reduced vision believed to be due to a toxic reaction in the optic nerve.
Manual keratometer
A keratometer is a medical instrument that uses corneal reflections to measure the curvature of the cornea.
A keratometer is a medical instrument that uses corneal reflections to measure the curvature of the cornea.
Dye Disappearance Test
A special dye test is often used to diagnose a blocked tear duct.
A special dye test is often used to diagnose a blocked tear duct.
Vision - HowTos
An index of HowTos for the Vision guide site.
An index of HowTos for the Vision guide site.
Reading Glasses After LASIK?
Will I need reading glasses after LASIK?
Will I need reading glasses after LASIK?
Lasik Side Effects
What side effects can I expect after LASIK?
What side effects can I expect after LASIK?
LASIK Pretests
If you are considering LASIK, the following tests should be performed before determining if you should go forth with surgery.
If you are considering LASIK, the following tests should be performed before determining if you should go forth with surgery.
Good Habits
Having good eye sight greatly improves quality of life. Make a concious effort to keep your eyes in their best condition by following these quick tips.
Having good eye sight greatly improves quality of life. Make a concious effort to keep your eyes in their best condition by following these quick tips.
Diabetes and Eye Disease
Eye disease associated with diabetes can cause blindness. Know the facts about diabetic eye disease to lower your risk of vision loss.
Eye disease associated with diabetes can cause blindness. Know the facts about diabetic eye disease to lower your risk of vision loss.
Vision Insurance Information
Health insurance can be confusing, but it is to your benefit to understand the differences between medical and vision insurance.
Health insurance can be confusing, but it is to your benefit to understand the differences between medical and vision insurance.
Higher-order Aberrations
Higher order aberrations are visual obscurations that cause visual symptoms in some patients.
Higher order aberrations are visual obscurations that cause visual symptoms in some patients.
Presbyopia Definition
A condition common after age 40 in which a gradual lessening of the eye's power of accommodation causes difficulty in seeing near objects.
A condition common after age 40 in which a gradual lessening of the eye's power of accommodation causes difficulty in seeing near objects.
Amsler grid
Amsler grid
Amsler grid
Astigmatism Definition
Definition of astigmatism.
Definition of astigmatism.
Face Blindness
Face blindness, or prosopagnosia, is the inability to differentiate between faces.
Face blindness, or prosopagnosia, is the inability to differentiate between faces.
Keratoconus
Keratoconus is an irregular protrusion of the cornea.
Keratoconus is an irregular protrusion of the cornea.
Anterior chamber
The fluid-filled space inside the eye between the iris and the cornea.
The fluid-filled space inside the eye between the iris and the cornea.
Wavefront aberrations
Scanning diagnostic instrument which uses wavefront technology to measure the wavefront errors (aberrations) of the eye.
Scanning diagnostic instrument which uses wavefront technology to measure the wavefront errors (aberrations) of the eye.
Pterygium
A non-cancerous, wedge-shaped growth of the clear, thin tissue that lays over the white part of the eye (conjunctiva).
A non-cancerous, wedge-shaped growth of the clear, thin tissue that lays over the white part of the eye (conjunctiva).
Retina
The retina is the light sensitive layer of tissue in the back of the eye.
The retina is the light sensitive layer of tissue in the back of the eye.
Blocked Tear Duct
Newborn babies sometimes have blocked tear ducts.
Newborn babies sometimes have blocked tear ducts.
Tips for Glaucoma Patients
If you have glaucoma, there are certain things you should do to manage and treat your condition. Here, tips and hints for the glaucoma patient.
If you have glaucoma, there are certain things you should do to manage and treat your condition. Here, tips and hints for the glaucoma patient.
Diplopia
Diplopia is double vision.
Diplopia is double vision.
Ways to Lower Risk
If you have diabetes, you can significantly reduce your risk for developing diabetic retinopathy by following a few tips.
If you have diabetes, you can significantly reduce your risk for developing diabetic retinopathy by following a few tips.
Macular Degeneration Tips
Tips for improving quality of life for people with macular degeneration.
Tips for improving quality of life for people with macular degeneration.
How Do Eye Specialists Differ?
Ophthalmologists, optometrists and opticians all provide eye care services. They are known as the three O's of eye care.
Ophthalmologists, optometrists and opticians all provide eye care services. They are known as the three O's of eye care.
Bifocal
Bifocals are lenses that have two focal points, one for near vision and one for distance.
Bifocals are lenses that have two focal points, one for near vision and one for distance.
Vision Screenings
School eye exams are important for screening kids for vision problems. Learn about school vision screenings.
School eye exams are important for screening kids for vision problems. Learn about school vision screenings.