The knee is a hingelike joint, formed where the thighbone, shinbone, and kneecap meet. It is supported by muscles and ligaments and lined with cushioning cartilage. Over time, cartilage can wear away and the knee becomes stiff and painful.

After cataract surgery, it is important to have regular eye exams. This is the best way to check the health of your eyes. It will help you maintain good vision.

Your health care provider will let you know what you should and shouldn't do after you get home. You may need to wear eye protection the first day.

Cystoscopy is a way for your healthcare provider to get a close look at the inside of your bladder. If cancer is found, it may be taken out during this procedure. This is called transurethral resection (TUR).

Once cancer has been diagnosed, the next step is to choose the best way to treat it. To help do this, your healthcare provider checks what the cancer cells look like under a microscope. (This is called the cancer grade.).

Sinus headaches are caused by colds or allergies that make the nasal passages inflamed or infected. Learn about how to prevent and treat them.

With a migraine, you may have nausea and vomiting and be sensitive to light and sound. You may also have warning signs, such as flashing lights or loss of vision, before the pain starts. Cluster headaches recur in groups for days, weeks, or months.

Tension headaches cause a dull, steady pain on both sides of the head and in the neck and the back of the head. The eyes may also feel tired. Tension headache can be caused by lack of sleep, poor posture, eyestrain, stress, and other factors.

Contact lenses can correct presbyopia. They focus the image back onto the retina. This way, you can see an object clearly. There are 2 kinds of contacts you can choose from.

Glasses can correct presbyopia. They focus the image back onto the retina. This way, you can see an object clearly. There are several kinds of glasses you can choose from.