LASIK eye surgery

Gout

This animation shows uric acid crystals moving to the big toe joint causing pain.

• Gout

Macular degeneration

This animation shows the process of macular degeneration in the eye. The macula is the part of the retina that distinguishes fine details at the center of the field of vision. Macular degeneration results from a partial breakdown of the insulating layer between the retina and the choroid layer of blood vessels behind the retina. Macular degeneration results in the loss of central vision only.

• Vision

Tendon transfer to repair rotator cuff

A torn rotator cuff is sometimes repaired with a tendon from your back.

Colonoscopy

See what a doctor sees when you undergo an examination of your colon.

Reverse crunch with fitness ball

You can do many core exercises with a fitness ball. See the reverse crunch.