Contact Lens Fitting Flashcards
All contact lenses are prescribed in
Minus Cylinder
Px with less than A diopter of cylinder, the ________ power is used
Spherical equivalent
If you change the diameter, you change ________ to maintain same fit
Base curve
What does excessive movement mean and how do you fix it?
CL is to flat
A smaller BC or Larger diameter would be recommended
What is “suction cup” and how do you fix it?
CL is to steep
Need a larger B.C. or smaller diameter is recommend
What is lens awareness and how do you fix it?
Discomfort
Increase lens diameter to fix
If you need Durability/manipulation, you recommend
Thicker lens
General Rueleto follow
Px the thinnest lens to allow high transmission of oxygen
Define monovision
For Presbyopic patients
Monovision- one lens is for distance and the other for near
Describe a multifocal lens
For Presbyopic patients
Distance, intermediate, reading
Preferred over monovision
Light diverges
Concave lens
Light converges
Convex lens
Definition of HVID
Horizontal Visible Iris
What is HVID for
Corneal diameter measurement for CL
