cornea

     

The cornea is the transparent front part of the eye that covers the iris, pupil, an anterior chamber. Together with the lens, the cornea refracts light, and as a result helps the eye to focus, accounting for approximately 80% of the eye's optical power. In humans, the refractive power of the cornea is approximately 43 dioptres. While the cornea contributes most of the eye's focusing power, its focus is fixed. The curvature of the lens, on the other hand, can be adjusted to "tune" the focus depending upon the object's distance. Medical terms related to the cornea often start with the prefix "kerat-".

Trivia about cornea

  • It's the transparent part of the eyeball contact lenses are designed to come into contact with
  • This transparent membrane in the eye covers the iris & has no blood vessels
  • (Jon of the Clue Crew shows an anatomical diagram on the monitor.) When Lasik eye surgery is performed, a flap is made in the eye, folded back, & then the stroma, or middle section, of this eye part is reshaped using lasers
  • The sclera covers about 5/6 of the eyeball & this, about 1/6; don't get it scratched!
  • (Kelly of the Clue Crew demonstrates what she is describing in the clue.) If you close your eyes, place your finger lightly on your eyelid, & move your eye, you'll feel the bulge of this, the outer layer of the eye
  • This part, seen here, is often transplanted
  • The iris, or colored part of the eye, is covered by this transparent outer layer of tissue
  • Using a laser to reshape this eye part may correct myopia
  • The sclera & this consist of tough tissues that make up the outer layer of the eyeball & give it strength
  • A keratotomy is an incision of this eye part; a keratectomy removes part of it

Found pages about cornea

Users that searched for cornea