What does Fluorescein do?

 What does Fluorescein do?

To increase the vault of a soft contact lens you could select a:

With a rigid contact lens in place, a fluorescein pattern shows a narrow band horizontally with a concentration of fluorescein inferior and superior under the lens. Which one of the following types of astigmatism is represented by this pattern?

  if a patient’s prescription is -2.50 +0.25 x090 and the lens is to be fitting 0.75D steeper than the flattest meridian of the cornea, the power of the contact lens should be:

In cases of high degrees of corneal astigmatism, which type of lens probably would result in the best fit?

The corneal topographer may be used to: Measure Corneal Astigmatism Locate the Corneal Apex Evaluate Corneal Eccentricity Measure the retinal thickness

 If a soft lens with a base curve of 8.6 was slightly tight, which of the following base curves would you try?

To increase the vault of a soft contact lens you could select a:

“K” Readings: 44.00D/45.00D x090          Rx: -2.00 -1.00×180 The correct design of the C.P.C (Base Curve) and power of a contact lens fitting 0.50D steeper than “K” would be: