I. Thomas McKay demonstrates
a machine.
A. The machine shows how
well his eyes see.
B. Thousands of light beams are sent into his eyes.
C. Light beams measure how well his lens can focus.
D. It is called wave front technology.
II. Professor Josef Bille
was the inventor.
A. He was a physics professor in Germany.
B. Bille pioneered it twenty-five years ago.
C. He was at the University of Heidelberg.
D. The machine was to counter telescopic distortion.
III. How the Visx machine operates.
A. Light beams are reflected off the retina.
B. Then the beams are bent and show abnormalities.
C. The results show how much eye correction is needed.
D. If you score 77 overall, your eye sees well.
IV. Dr. Stephen McLeod is an eye doctor.
A. He is an ophthalmologist in San Francisco.
B. McLeod checks patients with eye chart.
C. Vision is more than eyes bent toward light.
D. Visx can be useful but can’t yet replace eye charts.
