Bifocal - Study guides, Class notes & Summaries

The answer is D. The posterior optical zone will directly affect the lens to cornea relationship of a rigid gas permeable lens. If the posterior optical zone is steepened, it will increase the sagittal depth. If it is flattened, it will decrease the sagittal depth. Changing the power, which is accomplished by changing the anterior optical zone, will not affect the sagittal depth of the lens, nor will changing its edge design. - 1. The sagittal depth of a rigid gas permeable contact lens can be a...

ABO Practical Exam (American Board of Opticianry) Questions With Complete Solutions Single Vision [Correct Ans: - corrects for one distance Multifocal [Correct Ans: - Corrects with two or more prescriptions (or 'powers') Bifocal [Correct Ans: - lens having two focus strengths Trifocal [Correct Ans: - pertaining to having three focus strengths

NCLE Practical Exam Which Curve is the Flattest? A) 7.5 mm B) 44.75 D C) 7.6 mm D) 45.50 D - 7.6 mm Inflammation of the Eyelids is Called: A) Palpebritis B) Keratitis C) Conjunctivitis D) Blepharitis - Blepharitis The Base Curve of a Rigid Lens was Ordered at 7.75 mm but Received at 7.85 mm. The Lens is _______ than ordered. A) 0.50 D Flatter B) 0.50 D Steeper C) 1.00 Flatter D) 1.00 Steeper - 0.50 D Flatter The Fairness To Contact...

NCLE Advanced Certification Exam LATEST 2024 ACTUAL EXAM CONTAINS QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES VERIFIED ANSWERS ALREADY GRADED A+ The answer is D. The posterior optical zone will directly affect the lens to cornea relationship of a rigid gas permeable lens. If the posterior optical zone is steepened, it will increase the sagittal depth. If it is flattened, it will decrease the sagittal depth. Changing the power, which is accomplished by changing the anterio...

a, an correct answerswithout, not, lack of analgesic = without pain ante correct answersbefore, in front of antepartum = before delivery bi correct answerstwo, twice, double bifocal = two lenses brady correct answersslow bradycardia = slow pulse, heartbeat contra correct answersagainst contraceptive = prevents pregnancy dis correct answersapart, free from disinfected = free from microorganisms dys correct answersbad, painful dysuria = painful urination endo correct an...

If the wearer complains of the bifocal line being somewhat in his way when driving, the problem may be alleviated by decreasing the distance between pads. True or False - correct answer False If the wearer complains that the glasses feel snug but still slip down the nose, one likely cause is that: A. The frame is too small B. The bridge fit is tight C. Pressure is being applied by the temple shafts anterior to the ear. D. Pressure is being applied on the very tips of the temples. - c...

ABO ACTUAL EXAM | QUESTIONS & 100% CORRECT ANSWERS (VERIFIED) | LATEST UPDATE | GRADED A+ | ALREADY GRADED Change a bifocal Rx to a single vision Rx ANSWER: Add the bifocal power to the sphere powers. OD: -0.50 OS: -0.25-0.25x172 Add: +1.75 Turns intoOD: +1.25 OS: +1.50-0.25x172 Anisometropia ANSWER: There is a difference of 3 diopters between both eyes; when the vision of the eyes differs by a large margin. Antimetropia ANSWER: Refers to Rx's that differ in sign. Deeagle...

ABO ACTUAL EXAM | QUESTIONS & 100% CORRECT ANSWERS (VERIFIED) | LATEST UPDATE | GRADED A+ | ALREADY GRADED Change a bifocal Rx to a single vision Rx ANSWER: Add the bifocal power to the sphere powers. OD: -0.50 OS: -0.25-0.25x172 Add: +1.75 Turns intoOD: +1.25 OS: +1.50-0.25x172 Anisometropia ANSWER: There is a difference of 3 diopters between both eyes; when the vision of the eyes differs by a large margin. Antimetropia ANSWER: Refers to Rx's that differ in sign. Deeagle...

ABO EXAM PRE-TEST 2024 150 mm -Answer-When ordering a six inch temple, its corresponding millimeter value is which of the following? A. 135 mm B. 140 mm C. 145 mm D. 150 mm 500 mm -Answer-What is the focal length of a 2 diopter lens? A. 500 cm B. 39.37 inches C. 500 mm D. 2 meters Nanometers -Answer-Wavelengths are measured in A. Meters B. Decimeters C. Centimeters D. Nanometers UVC -Answer-Which of the following has the shortest and therefore most harmful wavelength? A. UVC ...

Change a bifocal Rx to a single vision Rx - Add the bifocal power to the sphere powers. OD: -0.50 OS: -0.25-0.25x172 Add: +1.75 Turns into- OD: +1.25 OS: +1.50-0.25x172 Anisometropia - There is a difference of 3 diopters between both eyes; when the vision of the eyes differs by a large margin. Antimetropia - Refers to Rx's that differ in sign. Ex. OD: +0.25 OS: -0.75