Bifocal lens - 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...

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ABO (American Board of Opticianry) Exam Latest Questions With Complete Solutions Change a bifocal Rx to a single vision Rx [Ans: - 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 [Ans: - There is a difference of 3 diopters between both eyes; when the vision of the eyes differs by a large margin. Antimetropia [Ans: - Refers to Rx's that differ in sign. Ex. OD: +0.25 OS: -0.75 Simple H...

ABO Practical(ABO Practical broken down based on the ABO-NCLE practical Exam Candidate HandbookPractical Test Specifications sheet) Single Vision corrects for one distance Multifocal Corrects with two or more prescriptions (or 'powers') 00:05 01:09 Bifocal lens having two focus strengths Trifocal pertaining to having three focus strengths Calculating Prismatic Effects obtained at the center of an optical lens by producing a difference in edge thickness, eith...

Given the following information: K's 45.00 @ 180/42.00 @ 90 Rx -2.00 -4.25 x 90 Which of the following RGP lens designs would best correct this wearers vision? a. 45.00 -2.00 b. 42.00 -2.00 -4.25 x 90 prism ballasted c. 42.00 -2.00 d. 42.00/45.00 -2.00 - Answer-d. 42.00/45.00 -2.00 A _________ lens is a translating bifocal: a. concentric b. aspheric c. deffractive d. segmented - Answer-d. segmented A ________auxiliary trial lens will extend the keratometer to 61.00 D. a. -1.25 b....

COA Exam Questions and Answers Already Passed A "with" reflex associated with what refractive error? Hyperopia A bitemporal defect always suggest a defect in the Chiasm A cycloplegic ideal for office use d/t rapid onset and short duration Cyclopentolate A dendritic ulcer of the cornea is usually caused by what virus? Herpes simplex virus A disadvantage of chemical-based contact lens care system Irritation A headache that is preceded by flashing lights for 15 minutes is inv...

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. - Answer 1. The sagittal depth of a rigid gas permeable contact lens can be altered ...

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...

Ophthalmic Medical Assisting Exam Questions with Verified Solutions A daughter who usually accompanies her mother to all exams is unable to attend a follow up glaucoma visit calls and asks the OMA for an update on her mother's condition. What should the OMA do? Share info only if a current, signed permission to communicate is available in the med record A papoose board is useful in what situation? Immobilizing an infant during an ophthalmic eval A patient telephones the ophthalmol...

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 ...