ABO Advance Exam Study Questions with Complete Solutions Top Graded 2024

The amount of reflection of each surface of cr-39 lenses is approximately? A. 2% B. 4% C. 6% D. 8% - 4% The absorption of light in lenses is classified by two variables. What are they? A. Base curve and thickness B. Index of refraction and thickness C. Thickness and lens transmission D. Tint, and lens transmission - C. Thickness and len transmission The denser the tint in a lens____ A. The greater transmission of light through the lens B. The greater internal reflections in the lens C. The less transmission of light through the lens D. The fewer internal reflections in the lens - C the less transmission of light through the lens The standard transmissions in sun lenses should range between? A. 10% and 30% B. 15% and 30% C. 10% and 25% D. 15% and 25% - B. 15 and 30% If a person has exposure to sunlight at least 2 hrs or more during the day, A. Their tolerance of bright sunlight is increased B. Their tolerance of bright sunlight is decreased C. Their ability to adapt to quick lighting changes is increased D. Their ability to adapt to night vision is compromised if they don't protect their eyes from sun exposure. - D. A characteristic of a dark tinted glass lens with an RX of +4.00 sphere would be? A. Uniform density in color B. Dark on the edge and lighter in the center C. Dark in the center and lighter on the edge D. Waves in the tint - C. Dark in the center and lighter on the edge Given a high plus or high minus rx, which lens material would offer the best choice for uniform density in a sun lens A. Pigmented glass B. Cr-39 C trivex D b&c - D. B&C Although this may be the most popular color for sun lenses it is not recommended for patients with emerging cataracts - Grey _______ added to any color increases contrast - Yellow ______ is better than ____ for improving contrast A. Violet/gray B. Green/gray C. Gray/green D. Gray/ violet - B. Green/gray Glare is of more concern to which wearer? A. Red haired patient B. Computer user C. Cataract patient D. Presbyope - C. Cataract patient ________ are generally inorganic materials (metals or minerals) that are vacuum deposited to add color on glass lenses to give a uniform density of color on the lenses A.vacuum color coatings B. Deposit color coatings C. Heavy color coatings D. AR color coatings - A vacuum color coatings What company introduced CR-39 lenses - PPG Industries Abduction - Eye moves temporally Adduction - Eye moves nasally Depression - Eye moves down Intorsion - top of cornea rotates towards nose Extorsion - top of cornea rotates away from the nose convergence - Both eyes move nasally at the same time Divergence - Both eyes move temporally at the same time