How to wear reading glasses for the first time presbyopia

How to wear reading glasses for the first time presbyopia

"Presbyopia" is a certain age when it is difficult to use the eyes at close range. This is a phenomenon of aging of the human body. Most people have this phenomenon around the age of 40~45. The eyes will feel that the handwriting is blurry, and you must take the mobile phone and newspaper far away to see the handwriting on it, and see things more clearly in the case of sufficient light, and the distance of looking at the mobile phone changes with age. Presbyopia, we have to wear a pair of reading glasses for the eyes to relieve visual fatigue, how do we choose reading glasses for the first time? 1. The film type must be relatively wide, due to the aggregation effect of presbyopia near vision, coupled with the habit of reading and writing, the monocular visual axis should be moved downward when it is farther away (head-up) on the lens, and at the same time move inward by 2.5mm. The pupil is generally up and down the midline of the film type when looking up, so to make the reading glasses have enough field of view, the film type should meet the requirements of the upper and lower height greater than 30mm, not the smaller the film type, the better. The narrow sheet type within 25 mm is generally portable and used to temporarily supplement eyesight. 2. The front of the glasses should be wide, but the OCD (Optical Center Horizontal Distance) should be smaller. Since the users of reading glasses are more than middle-aged, the face shape is plump, the horizontal size of reading glasses is generally 10mm larger than the optical frame, but the near interpupillary distance is 5mm smaller than the distant interpupillary distance, so the OCD value should generally be 58-61mm for women and 61-64mm for men. 3. Reading glasses must be sturdy and durable. Presbyopia glasses are near-use glasses, and the eye rule of presbyopia is to supplement +0.50D (i.e. 50 degrees) every 5 years from the reading distance from the age of 40 (+1.00D, i.e. 100 degrees). Moreover, the frequency of taking off and wearing during use is dozens of times that of myopia glasses, so the parts of reading glasses must be strong or highly elastic materials. The anti-corrosion and anti-scratch performance of electroplating must be outstanding, and the hardening process of the lens should be good, and in general, it should be ensured that it will not be seriously deformed, rusted, or seriously worn within 2 years. In fact, in these points, the requirements for a good reading glasses are higher than those for glasses of the same grade. What kind of reading glasses to choose is very important for people who wear glasses for the first time, because each person's individual is different, different elevation, arm length, eye habits, eye presbyopia power is not the same, the presbyopia power of the left and right eyes may also be different, and some people have farsightedness, myopia, astigmatism and other vision problems at the same time, if you wear reading glasses that are not suitable for your eye condition for a long time, not only can not solve the problem, but also cause eye swelling, headache and other problems. Therefore, when the problem of presbyopia occurs, we should first go to a regular ophthalmology or optical store for optometry, and finally choose the right reading glasses for our own situation, so as not to buy a pair of finished glasses hastily because of trouble and money.