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7.3. Handling the Lenses
•
Develop the habit of always working with the right lens first to avoid mix-ups.
•
Remove the right lens from its storage case and examine it to be sure that it is moist, clean,
clear, and free of any nicks or tears. If the lens appears damaged, do not use it. Use a new
lens.
Verify that the lens is not turned inside out by placing it on your forefinger and checking its profile.
The lens should assume a natural, curved, bowl-like shape (Fig. A). If the lens edges tend to point
outward, the lens is inside out (Fig. B).
Another method is to gently squeeze the lens between the thumb and forefinger. The edges
should turn inward (Fig A). If the lens is inside out, the edges will turn slightly outward (Fig. B).
Fig. A
Fig. B
