1.   In electron microscopes, light is replaced by a stream of electrons and glass lenses are replaced by electromagnets.

2.   Because replacing the lens was thought to be impossible, many ophthalmologists looked down on anyone who tried, and Ridley planned the first operations in secret.

3.   But cataract-clouded lenses can be replaced with plastic inserts, while there is no effective treatment for macular degeneration in most sufferers.

4.   Intraocular lens to replace lens clouded by cataracts.

5.   In the surgery, the lens is replaced with a plastic implant.

6.   Look for inexpensive frames at a drugstore, have your ophthalmologist replace the lenses, and begin a wardrobe of eyeglasses to brighten every day.

7.   We can replace lenses clouded by cataracts.

8.   Her nickname came from her former habit of replacing one lens of her glasses with a condom during performances.

9.   Her nickname came from her habit of replacing one lens of her glasses with a condom during performances.

10.   Surgeons can remove the cataracts and replace the lens with a plastic one.