Expert insights and practical tips for better eye health.
Pinguecula is an abnormal yellowish raised growth on the conjunctiva (the clear membrane that covers the white of the eye) typically adjacent to the border where the colored part of the eye meets the white part of the eye. It usually appears on the side closer to the nose, is present in both eyes, and is relatively permanent.
Screen time is a big issue these days. You probably spend a good number of hours looking at screens, like your computer at work and at home, your smartphone, television, or other digital devices. Looking at screens too much can lead to eye strain. But the 20-20-20 rule will help.
When you look at your prescription for eyeglasses, you will see numbers listed under the headings of OS and OD. They are Latin abbreviations: OS (oculus sinister) means the left eye, and OD (oculus dextrus) means the right eye. Occasionally, you will see a notation for OU, which means something involving both eyes. In general, the further away from zero the number on your prescription, the worse your eyesight and the more vision correction (stronger prescription) you need. A “plus” (+) sign in front of the number means you are farsighted, and a “minus” (-) sign means you are nearsighted. These numbers represent diopters, the unit used to measure the correction, or focusing power, of the lens your eye requires. Diopter is often abbreviated "D." For people who have astigmatism, there will be three numbers in your prescription. The general form for