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Understand what kind of noise level is dangerously high on the job—and how best to protect your hearing.

Ultraviolet keratitis is when exposure to too much UV (ultraviolet) light hurts your cornea. This causes pain and affects your vision.

Refractive surgery can improve your eyesight, but it does have some risks.

LASIK is laser surgery that helps reshape your cornea. It can help you see better without glasses or corrective lenses.

Phakic intraocular lenses (PIOLs) can help you see better without glasses or corrective lenses. Here's what you can expect.

Laser photocoagulation uses a laser to seal off abnormal blood vessels in your eye. Laser photocoagulation can't restore eyesight that you already have lost. But it may slow down the damage to your central vision.

Photodynamic therapy is a treatment for the eyes. It uses lasers and a special medicine that works when exposed to a type of light. It is done to treat age-related macular degeneration (AMD).

Pneumatic retinopexy is a procedure to correct a detached retina. It helps to bring back vision. It uses a special tool to repair the retina, and a small bubble of gas to hold the retina in place so it can heal.

A vagus nerve stimulator (VNS) is a device that can help prevent seizures. It can also treat depression, obesity, as well as other conditions. It has 2 parts: a pulse generator and leads. The pulse generator sits in your chest under your skin. The leads run from the generator to a vagus nerve in your neck. The VNS is put in your body during a surgery.