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  2. Amblyopia - Wikipedia

    en.wikipedia.org/wiki/Amblyopia

    While treatment improves vision, it does not typically restore it to normal in the affected eye. [2] Amblyopia was first described in the 1600s. [9] The condition may make people ineligible to be pilots or police officers. [2] The word amblyopia is from Greek ἀμβλύς amblys, meaning "blunt", and ὤψ ōps, meaning "sight". [10]

  3. Refractive error - Wikipedia

    en.wikipedia.org/wiki/Refractive_error

    When an eye focuses light correctly on to the retina when viewing distant objects, this is called emmetropia or being emmetropic. This means that the refractive power of the eye matches what is needed to focus parallel rays of light onto the retina. A distant object is defined as an object located beyond 6 meters (20 feet) from the eye.

  4. Visual impairment - Wikipedia

    en.wikipedia.org/wiki/Visual_impairment

    Amblyopia: is a category of vision loss or visual impairment that is caused by factors unrelated to refractive errors or coexisting ocular diseases. [59] Amblyopia is the condition when a child's visual systems fail to mature normally because the child either has been born premature, measles, congenital rubella syndrome, vitamin A deficiency ...

  5. Farsightedness - Wikipedia

    en.wikipedia.org/wiki/Farsightedness

    Accommodative dysfunction, binocular dysfunction, amblyopia, strabismus [3] Causes: Axial length of eyeball is too short, lens or cornea is flatter than normal, aphakia [2] Risk factors: Ageing, hereditary [2] Diagnostic method: Eye exam: Differential diagnosis: Amblyopia, retrobulbar optic neuropathy, retinitis pigmentosa sine pigmento [4 ...

  6. Anisometropia - Wikipedia

    en.wikipedia.org/wiki/Anisometropia

    In this example the first eye, with a −1.00 diopter prescription, is the stronger eye, needing only slight correction to sharpen the image formed, and hence a thin spectacle lens. The second eye, with a −4.00 diopter prescription, is the weaker eye, needing moderate correction to sharpen the image formed, and hence a moderately thick ...

  7. Hypertropia - Wikipedia

    en.wikipedia.org/wiki/Hypertropia

    Refractive errors such as hyperopia and anisometropia may be associated abnormalities found in patients with vertical strabismus. The vertical miscoordination between the two eyes may lead to Strabismic amblyopia, (due to deprivation / suppression of the deviating eye) cosmetic defect (most noticed by parents of a young child and in photographs)

  8. Aniseikonia - Wikipedia

    en.wikipedia.org/wiki/Aniseikonia

    Aniseikonia can occur naturally or be induced by the correction of a refractive error, usually anisometropia (having significantly different refractive errors between each eye) or antimetropia (being myopic (nearsighted) in one eye and hyperopic (farsighted) in the other.)

  9. Worth 4 dot test - Wikipedia

    en.wikipedia.org/wiki/Worth_4_dot_test

    The 2 red lights from the right eye are seen on the right side; The 3 green lights from the left eye are seen on the left side; This is recorded as: W4LT (D): 5 lights (Uncrossed Diplopia) ET NB: The clinician will be unable to indicate which eye is the deviating eye based on these results alone.