Poor eyesight

Low eyesight is an imprecise term used for various visual deficits and, among other things, stands for:

• Amblyopia - functional weak-sightedness without an organic cause, which persists even with optimal optical correction
• Ametropia - optically related ametropia ( nearsightedness , farsightedness , astigmatism )
• Color impairment - different forms of color ametropia or color blindness
• Visual impairment and blindness - significant visual acuity - or visual field reduction of a circumscribed extent
• Night blindness - impaired vision at dusk and in the dark
• Anisometropy - different refractive ratios of the eyes
• Diplopia - double vision, among other things due to strabismus , motor or sensory fusion weakness, etc.
• Presbyopia - presbyopia (physiological, age-related loss of the ability of the eyes to focus)
• Amaurosis - complete lack of visual stimulus perception