Latest Vision Articles

1. Two types of essential fatty acids

Excessive fat is always associated with obesity, but normal level of fat is essential to our health. Proper kinds and mount of fats help maintain our body’s function and overall health including eyes. Fatty acids are indispensable in forming fats. These nutrients help in the normal production and functioning of cells, muscles, nerves and organs as well as the regulation of blood pressure, heart rate and blood clotting. Omega-3 fatty acids and omega-6 fatty acids are two types of essential fatty acids, which can only acquired from external foods. The human body can not produce these essential fatty acids.

2. Asymmetric monovision contact lenses

Unlike bifocal contact lenses, a monovision-treated lens has only one power. Since bifocal contact lenses have two focal points on a single lens, people may take a period of time to adjust to the power change during vision switch. The fitting technique monovision provides another effective solution to prescription eyes.

3. Astigmatism corrective toric contact lenses

Nowadays, toric contact lenses are available in nearly all lenses types, such as soft materials, disposable, frequent replacement, multifocals and colored types.

4. FDA-approved treatments for AMD

Currently, there are several FDA-approved macular degeneration treatments, which can preserve or even improve remaining vision.

5. Eye charts for visual acuity testing

Currently, your visual acuity can be tested using the Snellen eye chart, invented by a Dutch eye doctor in the 1860s. The typical Snellen chart consists of 11 rows of capital letters, which are gradually reduced in size.

6. Aspheric lenses with curvature changes

Unlike spherical lenses, aspheric lenses have different curvatures on their front surface. It is commonly known that spherical lenses have the same curve across their entire surface. The changes in curvature allow aspheric lenses to have flatter curves than conventional lenses, bringing thinner and slimmer appearance.

7. Computer-based low vision aids

For people with low vision, there are various low vision aids such as eyeglass-mounted magnifiers, handheld magnifiers and stand-alone magnifiers. In addition to these common aids, partially sighted people can also take use of other means while doing computer work, such as word-processing, creating and using spreadsheets and browsing web pages. Special software enables computer users to enlarge the text size or just “listen” to texts.

8. Flaxseed oil for dry eye treatment

One of the most common eye problems that affect millions of people is dry eye, which has possible causes including allergies, refractive surgeries as well as other eye diseases. Medications such as eye drops and ointments are usually used to treat dry eye.

9. Advantages and adaption of progressive lenses

Progressive lenses are a significant breakthrough since they offer a much better solution to people who need reading glasses. In the past, presbyopic individuals had only bifocals and trifocals with visible lines for selection. Eliminating those visible lines, progressive lenses are sometimes called no-line bifocals.

10. What a thorough eye test will cover

A comprehensive eye exam contains several tests, from simple eye chart reading to tiny structure visualization. Some factors play a role in deciding the exam time, such as caseload and test complexity.

Retinoscopy is always used to get an approximation of your prescription. You will be required to fixate on a large target and receive a light shined by the doctor. By changing lenses in front of your eyes and interpret the light reflects from your eyes, the doctor can work out the general prescription of your eyes.