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When 2 lenses are combined to make one eyeglass. Upper lens for a good distance visions while other lower lens for clear close vision.

Thin segment of tissue on the superficial of the cornea made at the initiation of LASIK surgery. Created with either a microkeratome or a femtosecond laser.

A corneal topographer shines light onto the exterior of the eye and then measures the returned light to create a map of the cornea’s curvature as well as any abnormalities.

A process that lets your surgeon to customize the LASIK procedure to your individual eyes. Custom LASIK uses an device called a wavefront analyzer to measure the way light travels through your eye.

Type of “cold” laser that produces ultraviolet light. Used in refractive surgery to eliminate corneal tissue and reshape the corneal surface.

Scattering generated from the bright light that reduces the vision.

Corneal clouding that produces the sensation of looking through smoke or fog.

A refractive inaccuracy in the cornea, which results in the incapability to see nearby, objects as clearly as far objects.

An device that measures the curving of the eye’s clear, front surface (cornea).

A laser device used to create a corneal flap.