Page 71 - The Book Pi in eye

Pi in eye

What is mini-RK?

Mini RK is used to treat eyes with minimal myopia with vertical
incisions avoiding the central zone of the eye. Today it is used to treat
around one diopter of nearsightedness in patients who are not
candidates for Lasik.

What is CK?

A spherical probe introduces radio frequencies into the peripheral
cornea causing focal collagen shrinkage. It is like tightening a belt. It
causes the central cornea to steepen and increase power. It can
therefore treat farsightedness or presbyopia. Regression is higher and
in a year or two the effect wears off.

What is LASIK?

A corneal flap is fashioned by an automated micro- keratome or
laser. Precise photoablation by an excimer laser changes the shape
and curvature of the cornea.

What is PRK/LASEK/SUPERLASIK/EPILASIK?

The cornea is not invaded to make a flap. The top layer epithelium
is first removed by one of these methods: mechanically (PRK),
alcohol (Lasek), or epikeratome (Superlasik-Epilasik). Photoablation
is then performed.

What is a Corneal Transplant?

A donor cornea obtained from a cadaver replaces the damaged
cornea of the patient. The eye may still need optical correction to see
well.

What are INTACS?

PMMA, plastic ring segments which give support to a weak
cornea, and push up the central displaced cone. It improves vision
and decreases higher order aberrations.

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