Aspheric - Study guides, Class notes & Summaries

Certified Paraoptometric Exam Study Guide with Complete Solutions Ophthalmoscopy - Correct Answers The Examination of the inside of the eye. Vertex distance - Correct Answers The distance from the back surface of the lens to the front of the eye. Fundus - Correct Answers The interior portion of the eyeball that may be seen on ophthalmoscopy. Turn the eye downward - Correct Answers What is the primary function of the inferior rectus muscle? Sub conjunctival hemorrhage - Correct Answe...

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. - ANSWER 1. The sagittal depth of a rigid gas permeable contact len...

What is the thickest layer of the cornea? - ANSWER stroma Which corneal layer controls the fluid content of the cornea? - ANSWER endothelium What is cornea edema? - ANSWER excess fluid in the stroma that can swell it and lead to loss of visual acuity What kind of contact lenses must be stabilized (not rotate) on the eye for good vision? - ANSWER toric contact lenses Concentric vs Aspheric Multifocal Lens Design - ANSWER aspheric multifocal lenses have a gradual change in power from d...

ABO- OPTICAL TERMINOLOGY EXAM | QUESTIONS & 100% CORRECT ANSWERS (VERIFIED) | LATEST UPDATE | GRADED A+ | ALREADY GRADED Abbe Value ANSWER: A numerical expression of how prone a lens material is to causing chromatic aberration. The higher the Abbe value the lower the change it will cause aberration. Aberration ANSWER: An unclear image of an object when viewed through a lens. ABO ANSWER: American Board of Opticianry an agency that provides various levels of certification fo...

Ophthalmoscopy - Answer The Examination of the inside of the eye. Vertex distance - Answer The distance from the back surface of the lens to the front of the eye. Fundus - Answer The interior portion of the eyeball that may be seen on ophthalmoscopy. Turn the eye downward - Answer What is the primary function of the inferior rectus muscle? Sub conjunctival hemorrhage - Answer A broken blood vessel between the sclera and conjunctiva. What does a lensometer measure? -...

NCLE Advanced Certification Exam Questions and Answers Already Passed 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 d...

What is the thickest layer of the cornea? - ANSWER-stroma Which corneal layer controls the fluid content of the cornea? - ANSWER-endothelium What is cornea edema? - ANSWER-excess fluid in the stroma that can swell it and lead to loss of visual acuity What kind of contact lenses must be stabilized (not rotate) on the eye for good vision? - ANSWER-toric contact lenses Concentric vs Aspheric Multifocal Lens Design - ANSWER-aspheric multifocal lenses have a gradual change in power from d...

1. The sagittal depth of a rigid gas permeable contact lens can be altered without changing the diameter by: A. Changing the power B. Changing the edge design C. Changing the radius of curvature of the anterior optical zone D. Changing the radius of curvature of the posterior optical zone - 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 sa...

annular bifocal contact - Answer A lens with distance portion ground into the center of the lens and the near portion ground into the periphery aphakic lenses - Answer lenses designed for post-cataract fitting apical zone of cornea - Answer the central portion of the cornea with a constant radius of curvature. Also called the corneal cap. artificial tears - Answer medications, many of them over the counter, to treat dry eyes aspheric lens - Answer A non-...

All of the following statements regarding aspheric lens designs are true except: It is important to always use monocular interpupillary distances. Aspheric lenses are flatter, thinner and provide a lesser field of view. Aspheric designs are recommended for powers greater than +/- 3.00 D There is an adaptation period when switching from conventional spherical lenses to an aspheric design. - ACCURATE ANSWERS Aspheric lenses are flatter, thinner and provide a lesser field of view. Saf...