7 Common Senses You Need Know About Fitting Glasses
Regarding optometry and glasses, some people do not pay attention to it, and some people have some misunderstandings. Today I will talk about some common knowledge about optometry and glasses. I hope everyone can treat optometry and glasses scientifically and correctly.
1. When fitting glasses, the principle of best visual acuity and maximum positive degree is generally followed.
Best visual acuity: general medical glasses to correct vision only need to 1.0 on it.
Maximum positive specularity:
1) For myopia patients, it refers to the minimum degree of myopia when the best vision (1.0) is achieved, which ensures that the eyes are clear and bright when looking far away, and will not be overly fatigued when looking close.
2) For hyperopia patients, the highest hyperopia power when reaching the best vision (1.0).
2. Corrected visual acuity refers to the corrected visual acuity of one eye. The corrected visual acuity of one eye can reach 1.0, and the corrected visual acuity of both eyes may be 1.2. Sometimes, the correction of visual acuity to 0.8 is OK for patients who do not need to use the eyes frequently.
3. There is a principle when fitting glasses: short-sighted glasses should be shallow rather than deep, and it is advisable to correct them to 0.9 to 1.0; long-sighted glasses should "give enough", and how many degrees should be matched.
4. Optician glasses are not that the higher the corrected visual acuity is, the better. Some myopia patients hope that the corrected visual acuity can reach 1.5 when they are fitted with glasses. They think that the higher the visual acuity, the better. In fact, it will damage the adjustment function of the eyes and cause asthenopia.
5. Some patients hope that the corrected visual acuity should not reach 1.0, and they are afraid that the more clearly they can see, the faster the increase in myopia will be. This is also a misunderstanding, and it will deepen the myopia in the long run.
6. Optician glasses are only refractive correction, not a treatment. (Doctors from Xiamen Eye Center affiliated to Xiamen University reminded: you should pay attention to using your eyes reasonably, and do not use your eyes at close range for a long time.)
7. The lens correction of myopia can generally reach above 1.0. If it does not reach above 1.0, there may be several problems:
? The glasses are not matched
? Have myopia and amblyopia
? Have myopic fundus changes
? Complications of myopia
