Farsightedness (Hypermetropia)

Farsightedness is a type of ametropia in which parallel rays coming from distant objects converge behind the retina. Mild farsightedness (up to 3 diopters) is normal refraction. Medium (3.5-6 diopters) and high (more than 6 diopters) farsightedness should be considered as a consequence of delayed growth of the eyeball, the cause of which is not yet clear enough.

Decreased vision is usually observed only with moderate and especially high degree of farsightedness. Vision improves when positive lenses are placed on the eye. In adults, the degree of hypermetropia usually does not change, but vision, especially near vision, deteriorates with age due to weakening of accommodation (see Presbyopia).

The diagnosis in children is based on determining refraction after instilling a 0.5-1% atropine sulfate solution into the conjunctival sac 2 times a day for 3 days. In adults, as a rule, refraction is determined subjectively.

Treatment. In preschool age, constant correction of even a small degree of hypermetropia with positive lenses is necessary. Schoolchildren and adults with moderate degrees of hyperopia are prescribed glasses for working at close range, and for high degrees - for constant wear.

With proper optical correction, good vision and ability to work are maintained.