Contact lensesare plastic devices that rest on top of your cornea and correct a refractive error. If you have a refractive error, you may have myopia (nearsightedness), astigmatism, hyperopia (farsightedness), or presbyopia (age-related farsightedness). ...
This can make it challenging to know which prescription glasses frame to choose and which glasses style will suit your face shape the best. Once you buy your spectacle frames, you're going to be wearing them for a while. So, it’s important to choose wisely. The problem is: there is ...
For example, if your prescription says -1.00, you have one diopter ofnearsightedness. This is a fairly mild amount of nearsightedness. If you are -4.25, that means you have 4 and 1/4 diopters of nearsightedness. This is more nearsighted than -1.00 and requires stronger (thicker) lenses...
How to Measure PD Our Lenses How to Choose Eyeglass Lenses Reviewed by: Dr. Matthew Miller, OD on May 19th, 2022 Single vision lenses are a type of glasses lens that correct vision for a single distance. That means, in general, that they work for people that are nearsightedness or far...
Pupillary distance explained: how to measure PD Glasses measurement: how to know your frame size? What is CYL, AXIS and SPH in eye prescription? What are 20/10, 20/20, and 20/40 vision? Nearsighted vs farsighted vision: differences and glasses guides ...
Progressives also eliminate a problem called "image jump" which is experienced with bifocal and trifocal lenses. The lines on the lenses create a drastic change in power which causes images to appear to jump as you move from distance to near. Progressives create a smooth, more comfortable tra...