Originally Posted by
chip anderson
In the summer months we receive more warped and flattened, or even occasionally steepened (rigid) lenses than any other time of the year. Why: Because the UPS trucks are hotter and the labs are more pressed to turn lenses out in a hurry. It is our DUTY to catch these things before they make it to the patient. How are they detected? Method #1 With a radiuscope, If you get a toric pattern or any reading you don't expect, it's wrong. Method #2
This can be detected with a keratometer and a devise called a contacheck (W/J). Here you supend the lens in water and focus the kerotometer thorugh a 45 degree mirror. How much is too much? 1/4 diopter.
Chip:drop: