Vision--vision may decline with age for several reasons.
examples:
1.dry eyes are common and may be due to poor quality tears or too few tears being produced, it can also be caused by too many tears.
2.people may deveop floaters to due the vitreous in the eye breaking down. they may also develop flashes caused by the vitreous pulling away from the retina. This condition needs to be watched closely due to a retinal detachment could occur and could cause some permanent vision loss if not caught soon enough.
3.Presbyopia is very common over age 40 is the condition of not being able to read small print and is caused by the lens of the eye hardening with age and the iris not accomadating to light changes as easily.
4.Glaucoma can also develop and this is due to an over accumulation of vitreous humor in the eye, causing a rise in intraocular pressure(ie eye pressure). This tends to affect one's peripheral vision.
5.Cataracts are also a common aging affect and are caused by a clouding of the lens of the eye.
6.Age-related macular degeneration is also a possible affect of aging eyes. It involves impairment of the macula which is important in keeping images from being blurred.
Smell/Taste--by the fifties they start to diminish due to a loss of olfactory receptors
Hearing--by age 60 a quarter of the population experiences hearing loss.
Hearing loss may be due to many years of accumulated noise damage to sensitive hair cells of the organ fo Corti in the inner ear
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