Surgery for a retinal detachment

Occasionally, the vitreous gel (the egg white–like substance that fills most of the eyeball) pulls on the retina with enough force to tear it. This separation of the retina from the back of the eye allows fluid from inside the eye to enter through this tear and detach the retina from the choroid (the nutrient-rich layer underlying the retina). If this rupture is caught and treated early, a retinal detachment (see illustration) may be prevented. Retinal detachment (Locked) More »

The ups and downs of folic acid fortification

Folic acid is essential to the production of new cells, and helps protect against certain kinds of birth defects, but studies have suggested that an excess of folic acid may contribute to the growth of cancer cells. More »

Combating MRSA: The drug-resistant "superbug"

Though the drug-resistant bacterial infection known as MRSA typically occurs in hospital settings, new cases have developed as patients are discharged and bring the infection with them into their communities. (Locked) More »

Floaters, flashes, and retinal tears

Floaters and flashes in the eyes are fairly common among older people, but sometimes they can indicate a retinal tear, which, if not treated promptly, can lead to retinal detachment. (Locked) More »