ABO Practice Questions

A bifocal lens wearer having trouble accommodating can be helped by? - Adding plus power to his prescription A number 3 tint absorbs: - 80% of the light entering the lens How do you lower the front of the frame? - Move nose pads further apart or increase pantoscopic tilt (2 degrees = 1mm) How long should a prescription of a patient be kept for? - 3 years If the wearer complains that the glasses feel snug but still slip down the nose, one likely cause is that? - Pressure is being applied by the temple shafts anterior to the ear. In normal binocular vision, accommodation is always associated with: - Convergence Lens calipers are used to measure lenses for: - Lens thickness Limbus is surrounded by? - Cornea Magnesium Fluoride is used for: - Reducing the reflection Pantoscopic tilt can be increased to: - 18 degrees Photochromatic lenses will be darkest on what kind of day? - Cold and bright Scotoma - An area of retinal vision loss Tempering a lens by heat will result in the lens being: - More impact resistant The ability to maintain single binocular vision with both eyes is called: - Fusion The main reason for a lenticular lens is? - They are lighter in weight The new bifocal wearer must: - Drop the eyes to read a book The principle consumer protection agency of the federal government is? - The Federal Trade Commission The standard distance between double d segments? - 13 to 14mm The steps for "finishing" a lens are? - Edging, Centration, Blocking, Spotting