Latest Vision Articles

1. Regular and task-specific occupational multifocal glasses

Technological improvement of eyeglass lenses has brought much more options to customers. The period in which people with presbyopia were forced to wear the Franklin style bifocal lenses with visible lines across the lens has gone forever. Currently, new types of multifocal lenses are available, not to say various specialty eyeglasses such as computer glasses exclusively for intermediate vision.

2. Wearing contact lenses for prolonged time

According to wearing schedules, contact lenses have two types: daily wear and extended wear. The difference lies in that extended wear requires no removal before sleeping so that they can provide a clear vision as soon as you wake up. Extended wear contacts are designed to permit more oxygen on the cornea, which should get prior approval from FDA. While most extended wear contact lenses are made for continuous seven days wearing, silicone hydrogel-made ones can last up to 30 days without removal. This type is also available in RGPs. Thanks to technological improvement; extended wear contacts are comfortable during the full time period.

3. Reasons and treatments for macular holes

Both macular holes and macular degeneration happen more frequently to people above 60. However, they are not the same. Macular holes occur on the macula, which is situated in the center of retina and responsible for clear, color vision. The macula has a sharp point that is critical for some activities such as driving and recognizing faces.

4. Higher-order aberration diagnosis

It is less known that nearsightedness, farsightedness and astigmatism all belong to lower-order aberrations. And there are also higher-order aberrations such as coma, spherical aberration and trefoil. Higher-order aberrations may cause symptoms such as poor night vision, glare, halos, blurring, starburst patterns, double vision and loss of visual contrast. In most cases, slight higher-order aberrations are common and safe.

5. Various types of conjunctivitis

There are various types of conjunctivitis, all of which involve inflammation of the conjunctiva on the sclera.

6. Some New Discoveries and News in Vision

Doctors are suggested to take special care when prescribing fluoroquinolones to patients over 60. As a class of antibiotics used for bronchitis, pneumonia, sinusitis and certain skin infections, fluoroquinolones have been reported to be associated with double vision by investigators at Casey Eye Institute. This double vision may be caused by tendinitis in muscles around the eyes.

7. Vitrectomy and membranectomy

In most cases, a surgery is particularly for one certain eye disease. Vitreoretinal eye surgery (vitrectomy) is an exception that it can restore, preserve and enhance vision for many eye conditions such as certain types of age-related macular degeneration, diabetic retinopathy, diabetic vitreous hemorrhage, macular hole, retina detachment, epiretinal membrane, CMV retinitis, proliferative vitreoretinopathy, endophthalmitis, intraocular foreign body removal etc…

8. Screening and quantitative color blindness tests

During a comprehensive eye exam, you will always receive the Ishihara Color Vision Test for color blindness test, which is the most widely applied screening test invented by the Japanese ophthalmologist Shinobu Ishihara. The booklet of the test consists of typically 38 plates of many dots of various colors, brightness and sizes. Normal people can see clear numbers through these dots, which is beyond individuals with color blindness. Other abbreviated versions of this test comprise only 14 or 24 plates.

9. Eye drops and medications for glaucoma

In most cases, glaucoma eye drops are enough to control IOP and prevent eye damage. Glaucoma surgeries are always expensive and involve certain complications. For good candidates, the doctor may prescribe more than one type of drops to get best effects. These eye drops can bring down the high IOP.

10. Eyeglasses for different groups of people

A regular or full-time pair of eyeglasses always reflects the appearance of the wearer: sophisticated, fun-loving, youthful, conservative or style-conscious. Eyeglasses are often referred to a real part of the wearer’s identity.