How To Choose Reading Glasses When Presbyopia First Appears After The Age Of 40?

Presbyopia is difficulty using the eyes at a close distance at a certain age. It is a condition of functional embrittlement of the body. Most people have this condition in their 40s to 40s. The eyes will feel faint to see the fine handwriting, be sure to take the mobile phone, newspapers and periodicals far away to recognize the handwriting above, see things more clearly under the condition of abundant light source, the distance between playing mobile phones with age changes, the longer the hand.
Presbyopia after the age of 40, we need to add a pair of reading glasses for the eyes to reduce visual fatigue, the first time to buy reading glasses how to choose?
1. The film type must be relatively spacious, because of the combined effect of presbyopia when seeing near, coupled with the habit of reading articles, the monocular axis of vision should sink to the lens when viewing far (side view), and move inward 2.5 mm. When looking sideways, the eye pupil is generally around the center line of the piece, so to make the reading glasses have sufficient line of sight, the piece should consider the left and right aspect ratio of more than 30mm, not the lower the piece, the better. The narrow piece type within about 25mm is generally portable and temporarily fills the purpose of eye vision.
2. The face of the glasses should be wide, but the OCD(electronic optical management center horizontal distance) should be small. Because the reading glasses are used in the middle and old age, the face shape is rich, the standard specifications of the reading glasses are generally 11mm larger than the electronic optical frame, but the near pupil distance is 5 mm smaller than the far pupil distance, so the OCD value for women should generally be 58-61mm, and men should be 61-64mm, and two other provisions should be considered. It is necessary to apply a large diameter lens and have a large amount of photocentroid shift during production.
3. Make sure your reading glasses are durable. Presbyopia glasses are near-use glasses, and the regularity of eye fatigue in presbyopia is that the spacing between reading articles from the age of 40 (1.00D, that is, one hundred degrees) needs to be filled every 5 years by 0.50D(that is, 50 degrees). And in the whole process of application, the frequency of picking and wearing is tens of times that of myopia glasses, so the reading glasses parts must be firm or elastic cotton raw materials. The anti-corrosion and anti-scratch characteristics of the plating process must be highlighted, the hard processing process of the lens is better, and the overall need to ensure that the application is not more serious deformation, no rust, and not more serious friction in 2 years. In fact, here are several aspects of a good reading glasses that require a higher frame than the matching glasses.
How to choose reading glasses for the first time wearing glasses is very critical, because each person has personal differences, not the same rise, humerus length, eye habit, Presbyopia myopia degree is not the same, presbyopia myopia degree of both eyes is also very likely to be different, there are also some people to presbyopia also have far-sightedness, myopia, astigmatism and other eye vision problems, if long-term wearing is not suitable for their own eyes with reading glasses, not only difficult to solve the problem, but also will continue to cause headaches and other problems. Therefore, when there is a presbyopia problem, we should first go to a reliable orthopedic or optical store to carry out a vision examination, and ultimately choose a suitable reading glasses with its own condition, and do not have to choose a pair of manufactured glasses at will due to inconvenience, cost-effective and reckless.