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  2. Presbyopia - Wikipedia

    en.wikipedia.org/wiki/Presbyopia

    The aging eye condition [1] A person with presbyopia cannot easily read the small print of an ingredients list (top), which appear clearer to someone without presbyopia (bottom). Specialty: Optometry, ophthalmology: Symptoms: Difficulty reading small print, having to hold reading material farther away, headaches, eyestrain [1] Usual onset

  3. Computer vision syndrome - Wikipedia

    en.wikipedia.org/wiki/Computer_vision_syndrome

    Computer vision syndrome (CVS) is a condition resulting from focusing the eyes on a computer or other display device for protracted, uninterrupted periods of time and the eye's muscles being unable to recover from the constant tension required to maintain focus on a close object.

  4. Optics and vision - Wikipedia

    en.wikipedia.org/wiki/Optics_and_vision

    The human eye is an organ which reacts to light for several purposes. As a conscious sense organ, the eye allows vision. Rod and cone cells in the retina allow conscious light perception and vision including color differentiation and the perception of depth. The human eye can distinguish about 10 million colors. [3]

  5. Farsightedness - Wikipedia

    en.wikipedia.org/wiki/Farsightedness

    The signs and symptoms of far-sightedness include blurry vision, frontal or fronto temporal headaches, eye strain, tiredness of eyes, etc. [2] The common symptom is eye strain. Difficulty seeing with both eyes (binocular vision) may occur, as well as difficulty with depth perception. [1]

  6. Amblyopia - Wikipedia

    en.wikipedia.org/wiki/Amblyopia

    Poor alignment of the eyes, eye being irregularly shaped such that focusing is difficult, one eye being more nearsighted or farsighted, clouding of the lens [1] Diagnostic method: Vision testing [1] Differential diagnosis: Brainstem disorders, optic nerve disorder, eye diseases [3] Treatment: Glasses, eyepatch [1] [2] [4] Frequency ~2% of ...

  7. Visual snow syndrome - Wikipedia

    en.wikipedia.org/wiki/Visual_snow_syndrome

    Visual snow is a phenomenon where a person perceives visual disturbances, such as fine graininess or "static," in their field of vision. This can occur in low-light conditions, in the dark, or when the visual system amplifies light perception.

  8. Myopia - Wikipedia

    en.wikipedia.org/wiki/Myopia

    A number of alternative therapies have been claimed to improve myopia, including vision therapy, "behavioural optometry", various eye exercises and relaxation techniques, and the Bates method. [123] Scientific reviews have concluded that there was "no clear scientific evidence" that eye exercises are effective in treating myopia [ 124 ] and as ...

  9. Anisometropia - Wikipedia

    en.wikipedia.org/wiki/Anisometropia

    Anisometropia causes some people to have mild vision problems, or occasionally more serious symptoms like alternating vision or frequent squinting. However, since most people do not show any clear symptoms, the condition usually is found during a routine eye exam. [8] For early detection in preverbal children, photoscreening can be used.

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