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  2. Amblyopia - Wikipedia

    en.wikipedia.org/wiki/Amblyopia

    Amblyopia, also called lazy eye, is a disorder of sight in which the brain fails to fully process input from one eye and over time favors the other eye. [ 1] It results in decreased vision in an eye that typically appears normal in other aspects. [ 1] Amblyopia is the most common cause of decreased vision in a single eye among children and ...

  3. Toxic amblyopia - Wikipedia

    en.wikipedia.org/wiki/Toxic_amblyopia

    Toxic amblyopia, or nutritional optic neuropathy, is a condition where a toxic reaction in the optic nerve results in visual loss. Various poisonous substances may cause the condition as well as nutritional factors. [ 1] Tobacco amblyopia is a form of toxic amblyopia caused by tobacco containing cyanide. Tobacco amblyopia is marked by a gradual ...

  4. Ptosis (eyelid) - Wikipedia

    en.wikipedia.org/wiki/Ptosis_(eyelid)

    Ptosis of the left eyelid (unilateral ptosis). A headshot daguerreotype of an unidentified male, by William Bell in 1852. Ptosis, also known as blepharoptosis, [ 1] is a drooping or falling of the upper eyelid. This condition is sometimes called "lazy eye", but that term normally refers to the condition amblyopia.

  5. Astigmatism - Wikipedia

    en.wikipedia.org/wiki/Astigmatism

    With accommodation relaxed: Simple astigmatism Simple hyperopic astigmatism – first focal line is on the retina, while the second is located behind the retina.; Simple myopic astigmatism – first focal line is in front of the retina, while the second is on the retina.

  6. Exotropia - Wikipedia

    en.wikipedia.org/wiki/Exotropia

    Specialty. Ophthalmology. Exotropia is a form of strabismus where the eyes are deviated outward. It is the opposite of esotropia and usually involves more severe axis deviation than exophoria. People with exotropia often experience crossed diplopia. Intermittent exotropia is a fairly common condition. "Sensory exotropia" occurs in the presence ...

  7. Farsightedness - Wikipedia

    en.wikipedia.org/wiki/Farsightedness

    Treatment. Eyeglasses, contact lenses, refractive surgeries, IOL implantation [ 2] Frequency. ~7.5% (US) [ 5] Far-sightedness, also known as long-sightedness, hypermetropia, and hyperopia, is a condition of the eye where distant objects are seen clearly but near objects appear blurred.

  8. Refractive error - Wikipedia

    en.wikipedia.org/wiki/Refractive_error

    When refractive errors in children are not treated, the child may be at risk of developing ambylopia, where vision may remain permanently blurry. [19] Because young children typically do not complain of blurry vision, the American Academy of Pediatrics recommends that children have yearly vision screening starting at three years old so that unknown refractive errors or other ophthalmic ...

  9. Lazy eye - Wikipedia

    en.wikipedia.org/wiki/Lazy_eye

    Lazy eye refers to several specific ophthalmic disorders: Medicine. Amblyopia, a disorder of visual development in which the brain partially or wholly ignores input from one or both eyes; Strabismus, a disorder of ocular alignment in which the eyes aim in different directions; Ptosis (eyelid), drooping or falling of the upper or lower eyelid