The eyes may be the proverbial “window to your soul,” but it’s also true that your eyes are a window to your overall health. The eyes are the only place on the human body where ophthalmologists can visually observe blood vessels. The health of your eyes’ blood vessels can indicate how the rest of your … Continue reading
If you have cataracts and are considering surgery to correct the condition, you may not realize that you also have options to correct other vision impairments during the cataract surgery. If you are nearsighted or farsighted, or have an astigmatism or presbyopia, refractive cataract surgery can correct or improve your vision. Standard cataract surgery removes … Continue reading
For people who are unable to tolerate contact lenses or have severe dry eye syndrome, there’s a different type of contact lens that can be life-changing when it comes to improved vision and comfort. Scleral lenses are larger than typical contact lenses, ranging from 14 mm to over 20 mm in diameter. They are called … Continue reading
Almost everyone experiences the uncomfortable gritty feeling of dry eyes from time to time, but for many people having dry eyes is a chronic condition. Dry eye syndrome, also known as ocular surface disease, is an increasingly common disorder that happens when the eyes don’t produce the right amount or quality of tears. Tears are … Continue reading
All those beautiful spring blooms we’re seeing everywhere also mean that pollens and allergens are making their comeback, too. Tree pollens have kicked into gear, with grass and weed pollens ramping up. We all know that East Tennessee is a hotbed for seasonal allergies. In fact, the Asthma and Allergy Foundation ranked Knoxville as #9 … Continue reading
Nearsightedness, or myopia, occurs when the cornea has too much curvature or the eyeball is too long from front to back. Objects nearby appear in focus, but objects farther away are out of focus. Farsightedness, or hyperopia, occurs when the cornea has too little curvature or the eyeball is too short from front to back. … Continue reading
You’ve probably heard the term “cataract” but, if you’re like most people, you don’t actually know what it means. A cataract is a clouding of the eye’s crystalline lens, which sits behind the pupil and is responsible for focusing light. In a healthy eye, this lens is clear but over time proteins in the lens … Continue reading
The retina has a static contrast ratio of around 100:1 (about 6.5 f-stops). As soon as the eye moves (saccades) it re-adjusts its exposure both chemically and geometrically by adjusting the iris which regulates the size of the pupil. Initial dark adaptation takes place in approximately four seconds of profound, uninterrupted darkness; full adaptation through adjustments in retinal … Continue reading
Eye irritation has been defined as “the magnitude of any stinging, scratching, burning, or other irritating sensation from the eye”.[5] It is a common problem experienced by people of all ages. Related eye symptoms and signs of irritation are e.g. discomfort, dryness, excess tearing, itching, grating, sandy sensation, smarting, ocular fatigue, pain, scratchiness, soreness, redness, swollen … Continue reading