Choose your ordinary reading strength. This will be the power on the bottom, and the top powers are adjusted accordingly to meet the varying strengths of the average person. This is a "one size" fits all solution, and the powers cannot be customized. However, they will suit most people, and can save hundreds of dollars over going to the optician. Even other over the counter solutions are $10 to $80 more.
-Bottom is 100% full reading power
-Computer little less power
-Across desk 50%of full power
- +100, +150,+175,+200,+250,+275,+300
- Color Black,Brown,Red
- size 1 5/8" x 5 1/4" for average to wide faces
- spring hinge
- Also available in wayfarer, cat-eye, rimless bottom and pilot shapes.
|Power||+1.00, +1.50, +1.75, +2.00, +2.50, +2.75, +3.00|