Eye surgery sharpens up
Aug 10, 2004
Fed up with losing their glasses and fiddling
with contact lenses, over 11 million people
worldwide have opted for corrective laser
eye surgery. In this procedure, which costs
thousands of pounds, a laser is used to permanently
alter the shape of the cornea to
ensure that light is sharply focused on the
retina. It is therefore vital that ophthalmic
surgeons know the shape and thickness of
the cornea before they operate. Furthermore,
the thickness of the cornea provides
useful information about eye conditions such
as keratoconus, in which the centre of the
cornea protrudes, and is also an important
parameter in the design of contact lenses.
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