Tricurve lens - Study guides, Class notes & Summaries

optic zone - Answer the central portion of a contact lens which contains the refractive power and generally corresponds to the central corneal cap posterior apecal radius - Answer this term is generally used in reference to spin-cast soft lenses. the curvature of the posterior surface of the lens changes with the refractive power. the radius of curvature is measured at the apex of the posterior surface. steeper base curve - Answer occurs when the posterior radius of curva...

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

NCLE Exam Prep Questions and Answers Latest Update (2022/2023) 100% Pass optic zone the central portion of a contact lens which contains the refractive power and generally corresponds to the central corneal cap posterior apecal radius this term is generally used in reference to spin-cast soft lenses. the curvature of the posterior surface of the lens changes with the refractive power. the radius of curvature is measured at the apex of the posterior surface. steeper base curve occurs when the p...

NCLE Exam Prep Questions and Answers Latest Update optic zone -Answer the central portion of a contact lens which contains the refractive power and generally corresponds to the central corneal cap posterior apecal radius -Answer this term is generally used in reference to spin-cast soft lenses. the curvature of the posterior surface of the lens changes with the refractive power. the radius of curvature is measured at the apex of the posterior surface. steeper base curve -Answer occurs when...

NCLE Advanced Certification Exam Questions and Answers Already Passed 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 -Answer The answer is D. The posterior optical zone will directly affect the lens to cornea relationship of a rigid gas permeable l...

Optic Zone - Central portion of a contact lens which contains the refractive power (generally corresponds to the corneal cap) Posterior Apecal Radius - Spin-cast soft lenses. (Curvature of posterior surface changes with refractive power. Measured at apex of posterior surface) Steeper Base Curve - As the Posterior radius of curvature is decreased the base curve becomes: (i.e. 8.4-8.1) Flatter Base Curve - As the Posterior radius of curvature is increased the base curve becomes: (i.e. 8...

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. correct answers 1. The sagittal depth of a rigid gas permeable cont...

optic zone correct answers the central portion of a contact lens which contains the refractive power and generally corresponds to the central corneal cap posterior apecal radius correct answers this term is generally used in reference to spin-cast soft lenses. the curvature of the posterior surface of the lens changes with the refractive power. the radius of curvature is measured at the apex of the posterior surface. steeper base curve correct answers occurs when the posterior radius of cu...

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 lens ...

NCLE Latest Update (2022/2023) Already Graded A+ annular bifocal contact A lens with distance portion ground into the center of the lens and the near portion ground into the periphery aphakic lenses lenses designed for post-cataract fitting apical zone of cornea the central portion of the cornea with a constant radius of curvature. Also called the corneal cap. artificial tears medications, many of them over the counter, to treat dry eyes aspheric lens A non-spherical lens, in which the radii...