Generally speaking, the prism correction is usually left empty in most prescriptions since majority of prescription glasses wearers will not have a prism measurement. And many people always feel confused that what the actual function for this correction if the values are added to the prescription glasses.
Prism correction is used to treat eye muscle imbalances or other conditions that cause errors in eye orientation or fixation. And if you have crossed eyes, lazy eye, or some diseases of the eyes, you might found the image looking through the lenses are displaced if you only wear ordinary prescription glasses. Continue reading →
It is true that progressive multimodal glasses are very popular these days, because the multimodal lenses can give wearers all three ranges of vision(far distance, middle and near distance), but they also suffer the disadvantage of the power progression creating regions of aberration away from the optic axis. Some wearers find the visual discomfort caused by these distortions outweigh the benefits of wearing progressive glasses. So they prefer to wear lined bifocal glasses. Continue reading →
A lot of people wear sunglasses in summer and for myopic people, prescription glasses are needful on account of the sun shines strongly most of time in summer, people need to do some measures to protect themselves. As a result, sunglasses and prescription glasses are sold well on summer days. Most glasses shops have prescription glasses to sell. There are a variety of prescription glasses for customs to choose. Continue reading →
As can be seen, the situation of wearing glasses in college is more severe than in high school or senior high school. Just taking our dormitory for example, there’s only one of our four girls not wearing glasses and her eye-sight is now gradually becoming more and more poor. To other words, more and more students are getting closer to glasses and even we can say that glasses are necessities in student’s life.
A few years ago when I was in elementary school, glasses were still unusual to be seen, I remember. At that time, there were about 60 students in our class, including 4 or 5 students wearing glasses. However, there’re only 31 students in my new class, but about 2/3 of them all wear glasses. From these great changes, we must have realized how severe the present situation of students’ eye-sight is! Wearing glasses becomes more and more common, and the students’ eye-sight becomes more and more poor. Continue reading →
