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Course Approval Status:
ABO # STWQO032-3
APPROVED for 2 Hour(s) of CE
New York - (#09-02) DISP
APPROVED for 2 Hour(s) of CE
Florida
NOT APPROVED for 2 Hour(s) of CE
Tennessee Approval Pending
PENDING for 2 Hour(s) of CE
Nevada - SP
APPROVED for 2 Hour(s) of CE
Ohio - SP
APPROVED for 2 Hour(s) of CE
Georgia
PENDING for 2 Hour(s) of CE
Ontario Opticians (#2673 EG/CL)
APPROVED for 2 Hour(s) of CE |
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The light source will not always be labeled in the diagrams. This is because the rays do not have to be emitted from a light source to be diverging from a point. The rays of the sun that come through your window and are reflected off a paper toward your eye were emitted millions of miles away. But the rays that enter your eye when you look at the paper are diverging from that spot on the paper. As far as your brain is concerned, the spot on the paper is the source of the rays. If the paper is 16 inches from the eye, we can find the vergence of the rays when they reach the retina by using the formula: 1/f, which is 1 / (the eye-paper distance) in meters. 16 inches = 40 cm = 0.4 meters. The vergence of the rays entering the eye will be 1 / 0.4 m or 2.5 Diopters. |
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