Eye Diseases and Conditions
Glossary of eye diseases and various eye condiions and complications.
Allergen
Learn the definition of allergen.
Learn the definition of allergen.
Achromatopsia
Learn the definition of achromatopsia.
Learn the definition of achromatopsia.
Allergic Conjunctivitis
An inflammation of the conjunctiva of the eye due to an allergen.
An inflammation of the conjunctiva of the eye due to an allergen.
Anterior Ischemic Optic Neuropathy (AION)
Learn the definition of anterior ischemic optic neuropathy (AION).
Learn the definition of anterior ischemic optic neuropathy (AION).
Artificial Tears
Learn the definition of atificial tears.
Learn the definition of atificial tears.
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.
Atropine Eye Drops
As a treatment for amblyopia, atropine drops work by temporarily blurring vision, forcing the weaker eye to be used.
As a treatment for amblyopia, atropine drops work by temporarily blurring vision, forcing the weaker eye to be used.
Behcet's Disease
Behcet's disease often affects the eye.
Behcet's disease often affects the eye.
Blepharitis
Learn the definition of blepharitis.
Learn the definition of blepharitis.
Blocked Tear Duct
Newborn babies sometimes have blocked tear ducts.
Newborn babies sometimes have blocked tear ducts.
Chalazion
Learn the definition of chalazion.
Learn the definition of chalazion.
Choroidal Melanoma
Choroidal melanoma is a cancer of the eye that develops in a part of the eye called the choroid. Learn the full definition of choroidal melanoma.
Choroidal melanoma is a cancer of the eye that develops in a part of the eye called the choroid. Learn the full definition of choroidal melanoma.
Color Blindness
Learn the definition of color blindness.
Learn the definition of color blindness.
Cone-Rod Dystrophy
Cone-rod dystrophy (CRD) is a progressive retinal degenerative disease that sometimes leads to blindness.
Cone-rod dystrophy (CRD) is a progressive retinal degenerative disease that sometimes leads to blindness.
Congenital Cataract
Learn the definition of congenital cataract.
Learn the definition of congenital cataract.
Corneal Ulcer
A corneal ulcer is an opening, sore or erosion in the cornea that may cause blindness if severe and left untreated.
A corneal ulcer is an opening, sore or erosion in the cornea that may cause blindness if severe and left untreated.
Diabetic Retinopathy
Learn the definition of diabetic retinopathy.
Learn the definition of diabetic retinopathy.
Diplopia
Diplopia is double vision.
Diplopia is double vision.
Drusen
Drusen are small yellow deposits that form under the retina.
Drusen are small yellow deposits that form under the retina.
Epidemic Keratoconjunctivitis
Learn the definition of epidemic keratoconjunctivitis.
Learn the definition of epidemic keratoconjunctivitis.
Eye Allergy
Eye allergies can produce many annoying symptoms, including itchy, red eyes.
Eye allergies can produce many annoying symptoms, including itchy, red eyes.
Eyelid Margin Disease
Eyelid margin disease is a constant inflammation of the eyelids.
Eyelid margin disease is a constant inflammation of the eyelids.
Exophthalmos
Exophthalmos is a condition characterized by bulging of the eyes.
Exophthalmos is a condition characterized by bulging of the eyes.
Face Blindness
Face blindness (or prosopagnosia) is a disorder that makes someone unable to recognize faces.
Face blindness (or prosopagnosia) is a disorder that makes someone unable to recognize faces.
Floaters
Small particles that move in the vitreous, the substance that fills the cavity of the eye.
Small particles that move in the vitreous, the substance that fills the cavity of the eye.
Floppy Eyelid Syndrome
Learn the definition of floppy eyelid syndrome.
Learn the definition of floppy eyelid syndrome.
Glaucoma
A disease of the optic nerve in which vision is lost usually due to increased pressure inside the eye.
A disease of the optic nerve in which vision is lost usually due to increased pressure inside the eye.
Granulated Eyelids
Learn the definition of granulated eyelids.
Learn the definition of granulated eyelids.
Hypertensive retinopathy
A disease of the retina and retinal blood vessels that occurs because of uncontrolled high blood pressure.
A disease of the retina and retinal blood vessels that occurs because of uncontrolled high blood pressure.
Intraocular Lens
Learn the definition of intraocular lens, or IOL.
Learn the definition of intraocular lens, or IOL.
Keratoconus
Keratoconus can cause significant distortion of vision.
Keratoconus can cause significant distortion of vision.
Latisse
Learn the definition of Latisse.
Learn the definition of Latisse.
Low Vision
Low vision is vision loss that cannot be corrected, resulting in limited sight ability.
Low vision is vision loss that cannot be corrected, resulting in limited sight ability.
Macular Degeneration
Learn the definition of macular degeneration.
Learn the definition of macular degeneration.
Macular Edema
Learn the definition of macular edema.
Learn the definition of macular edema.
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.
Ophthalmic Migraine
Learn the definition of ophthalmic migraine.
Learn the definition of ophthalmic migraine.
Optic Neuritis
Learn the definition of optic neuritis.
Learn the definition of optic neuritis.
Papilledema
Learn the definition of papilledema.
Learn the definition of papilledema.
Phacoemulsification
Learn the definition of phacoemulsification, a cataract surgery option.
Learn the definition of phacoemulsification, a cataract surgery option.
Pharyngoconjunctival Fever
Learn the definition of pharyngoconjunctival fever.
Learn the definition of pharyngoconjunctival fever.
Phosphene
A phosphene is a phenomenon of seeing light without light actually entering the eye.
A phosphene is a phenomenon of seeing light without light actually entering the eye.
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.
Photophobia
Learn the definition of photophobia.
Learn the definition of photophobia.
Pinguecula
A common, non-cancerous growth of the mucous membrane lining the eyeball and underside of the eyelids (conjunctiva).
A common, non-cancerous growth of the mucous membrane lining the eyeball and underside of the eyelids (conjunctiva).
Pseudomembrane
Learn the definition of pseudomembrane.
Learn the definition of pseudomembrane.
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).
Red Eye
Red eye may be caused by many things.
Red eye may be caused by many things.
Retinitis pigmentosa
An eye disease in which there is damage to the retina. The damage worsens over time. People with this condition have problems with night vision and peripheral vision.
An eye disease in which there is damage to the retina. The damage worsens over time. People with this condition have problems with night vision and peripheral vision.
Retinoblastoma
Learn the definition of retinoblastoma.
Learn the definition of retinoblastoma.
Sarcoidosis
Learn the definition of sarcoidosis.
Learn the definition of sarcoidosis.
Scatter Laser Treatment
Learn the definition of scatter laser treatment.
Learn the definition of scatter laser treatment.
Second Sight
Learn the definition of "second sight."
Learn the definition of "second sight."
Subconjunctival Hemorrhage
A subconjunctival hemorrhage is a broken blood vessel in the eye.
A subconjunctival hemorrhage is a broken blood vessel in the eye.
Toxic amblyopia
Toxic amblyopia is reduction in visual acuity believed to be due to a toxic reaction in the orbital portion of the optic nerve. It is caused by multiple toxic and nutritional factors and probably other unknown factors.
Toxic amblyopia is reduction in visual acuity believed to be due to a toxic reaction in the orbital portion of the optic nerve. It is caused by multiple toxic and nutritional factors and probably other unknown factors.
Trachoma
Learn the definition of trachoma, an infectious eye disease.
Learn the definition of trachoma, an infectious eye disease.
Vasoconstrictor
Learn the definition of vasoconstrictor.
Learn the definition of vasoconstrictor.
Vernal Conjunctivitis
Vernal conjunctivitis is a seasonal inflammation of the outer lining of the eyes.
Vernal conjunctivitis is a seasonal inflammation of the outer lining of the eyes.
Vitrectomy
Learn the definition of vitrectomy.
Learn the definition of vitrectomy.