Latest Vision Articles

1. A brief introduction of subconjunctival hemorrhage

A subconjunctival hemorrhage has conspicuous appearance. Its most common symptom is red eye. Eye redness is directly caused by blood vessels break beneath the tissue covering the conjunctiva, which also explains the name of subconjunctival hemorrhage.

2. Four types of eye occlusion

Blocked blood flow may bring strokes in some parts of the body, including the eye. Eye blockage is caused by damage on vital structures such as retina and optic nerve.

3. Reasons for color blindness

If you can not distinguish blue and yellow or red and green, or sometimes other people may correct the color you see, you probably have color blindness. Color blindness is neither a form of blindness nor a full range of color disability. People with color blindness usually lack the ability to see certain colors properly. This is just a form of vision deficiency.

4. Optometrists and ophthalmologists

There are three types of eye professionals: optometrists, ophthalmologists and opticians, the former two of which are eye doctors.

5. Causes and treatments of corneal ulcer

A corneal ulcer is one of the most common eye problems, which may be caused by a variety of reasons. Bacterial infections from eye injury and trauma are common causes of corneal ulcer symptoms such as red, painful eye, discharge and vision reduction.

6. Presbyopic patients with varifocal contact lenses

If you need to read menu, newspapers from a further distance, you have probably developed presbyopia. Bifocal contact lenses are the solution to this vision problem. Bifocal contact lenses are available in soft and RGPs types, disposable type as well as silicone hydrogel extended type up to 30 days.

7. Causes and treatments of CMV retinitis

Cytomegalovirus (CMV) retinitis is an eye disease that closely relates to Acquired Immunodeficiency Syndrome (AIDS). CMV retinitis always invades the retina and affects the light-sensitive receptors, leading to acuity reduction and peripheral vision decrease. Without proper treatment, a detached retina and blindness can be caused within two to six months.

8. Various types of specialty eyeglasses

Besides eyeglasses for regular wear, there are still various types of specialty eyewear or “task-specific” eyeglasses. Since one pair of eyeglasses does not fit all sizes in most cases, those specialty eyeglasses such as computer glasses, driving eyeglasses and protective glasses are helpful in specific circumstances.

9. Low contrast sensitivity tests and treatments

Good vision such as 20/20 does not mean satisfying contrast sensitivity. Common vision tests using black letters or numbers displayed against white backgrounds can not reflect your exact contrast sensitivity, since the real world is filled with grey shades. So that special contrast sensitivity testing is necessary.

10. Cornea transplant procedure and recovery

Also called corneal graft and penetrating keratoplasty, a cornea transplant replaces the damaged central corneal tissue with healthy corneal tissue. People with damaged corneal tissue have blurry vision or glary vision. It is estimated that about 40,000 people in the United States receive cornea transplant each year, 79% of which never suffer from graft rejection. Even if graft rejection occurs, it can be treated with successful management.