Many people are beginning to experience visual discomfort with age. They think of buying reading glasses even if there are no significant changes in the optical system. The elderly notice that it is difficult for them to read because of presbyopia or wakefulness.
What is age hyperopia?
The lens of the eye ensures the clarity of the perception of multi-distant objects. In a young person, he can quickly change shape so that his vision remains clear at any distance. The lens is healthy, transparent, and elastic at this age, so reading problems do not occur.
However, in the aging process, the lens also suffers. It begins to harden and cannot increase its curvature for a clear perception of nearby objects. Reducing the refractive power of the lens involves impaired vision and, consequently, age-related farsightedness.
Presbyopia is practically an inevitable phenomenon that happens because of the processes of natural aging. Most people over the age of forty notice near visual impairment and rapid visual fatigue when working with small details or types.
With normal refraction of the eye, the presbyopia begins to develop in 40-45 years. If a person has a long vision, presbyopia can start at age 35 and myopia at age 55. It is worth noting that many patients with signs of intolerance have improved vision with age since long-term perception compensates for refractive errors.
What are reading glasses, and at what age should you buy them?
At first, a person can counterbalance the lack of accommodation by simply pressing the object in question, but over time, the view’s quality begins to decline. In this case, the person needs reading glasses with multifocal or progressive lenses.
Types of reading glasses:
- Focal lens lenses are a supplement to the primary correction.
- Bifocal. In such lenses, the upper part helps to focus the distance, and the lower leg – close. Bifocal lenses make it possible to read and, at the same time, can be used all day.
- Progressive. In such objectives, the optical power depends on the distance of the object in question. The lens has two visual areas with a smooth transition between them.
They are lying reading points. The design of such glasses is reminiscent of a periscope. A person can lie down and look up, but the lenses will let him see the book’s pages without having to bend his neck.
You can buy and use reading glasses only with your doctor’s approval. Independent selection of optical systems is strongly discouraged because the improper lens can aggravate eye problems.
An optometrist can prescribe reading glasses after the first eye exam, as it is possible to assess the lens’s condition and determine visual acuity at a given time. However, you must remember that the lens will continue to lose elasticity, so you must regularly monitor ophthalmologists.
Ophthalmologists recommend changing reading glasses every five years for the progression of presbyopia. As a result, every five years you have to buy new glasses, 0.5 diopters stronger than the previous ones. If in 40 years you need glasses with a diopter, then with 65, 3.5 diopters, glasses provide comfortable visibility. Usually, at the age of 65, the crystalline lens completely loses its elasticity and acquires a stable shape, so no further increase in diopters is required.
How to choose reading glasses
Diopter glasses should select after examination of the visual system. The doctor must determine the age and degree of deviation, using the lenses to choose a comfortable option.
If a person does not have additional disorders and visual characteristics, you can buy ready-made glasses. The main problem with the final glasses is the manufacturing standards. These glasses are made for the average patient so that both lenses have the same refractive power, while in most cases, the deviations have different degrees in different eyes. Also, the ready glasses adjust the standard distance of 63 ml interpupillary if a particular patient has this value, more or fewer mirrors.
They will cause discomfort, headaches, and dizziness.
How to calculate the optical power of reading glasses
Currently, there are universal glasses, the power of refraction that you can customize. These allow you to see for violations from -6 to +3 diopters. The average cost of universal points is 3 thousand rubles.
The conclusion of an ophthalmologist should justify the choice of reading glasses in the first place. During the examination, the doctor receives information about the functioning of the visual system and, when prescribing a prescription, also considers concomitant ophthalmic diseases that may affect vision. The glasses offered by the ophthalmologist are much more likely to provide comfortable visibility than those bought on your own.
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