Gas permeable lenses - Study guides, Class notes & Summaries

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...

Which of the following modifications to a rigid gas permeable lens can not be made in the office? A. Blending of peripherals curves B. Addition of minus power C. Polishing lens surface D. Changing the base curve - ANSWER D. Changing the base curve of a rigid gas permeable lens is not possible to do, but requires the ordering of a new lens. In-office polishing of the anterior surface of a rigid gas permeable lens surface will provide many benefits to the patient. Which of the followi...

NCLE Advanced Certification Exam 2023/2024 - Questions With Correct Answers. A lenticular or myoflange design will decrease the mass of an aphakic lens as well as increase the edge profile, which allows it to interact more with the upper lid and aid in positioning of the lens. - Answer 3. The mass of an aphakic rigid gas permeable contact lens can be reduced by making the lens design: A. Spherical B. Lenticular C. Tricurve D. Aspheric The answer is B. Increasing the optical zone diamete...

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 anterior optical z...

Chapter 4 CL: NCLE EXAM REVIEW (2024/2024) RATED A+ D. all of the above - Answer ️️ -The eyelids play an important role in the fitting and wear of contact lenses for which of the following reasons? A. they effect the wettability of the lens serface B. they effect the positioning of the lens C. they are sensitive and generally cause most of the discomfort when a lens is first placed on the eye. D. all of the above C. Loose lenses - Answer ️️ -Small puncuated stains on the corneal...

NCLE Test Questions And Answers Latest Update 2023/2024 (Graded A+). Which of the following prescriptions indicates against-the-rule astigmatism? a)-4.50 +1.00 x75 b)-4.50 +1.00 x 180 c)-4.50 -1.00 x 165 d)4.50 -1.00 x 180 - Answer a)-4.50 +1.00 x75 When a keratometer is being calibrated, which of the following targets will provide the most reliable result? a)the single-cut anterior surface of a high-plus lens b)a perfectly flat highly polished mirror c) a set of steell balls of known r...

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 Practice Test Questions And Answers Latest Update 2024 (Verified 100%) Which of the following prescriptions indicates against-the-rule astigmatism? a)-4.50 +1.00 x75 b)-4.50 +1.00 x 180 c)-4.50 -1.00 x 165 d)4.50 -1.00 x 180 - Answer a)-4.50 +1.00 x75 When a keratometer is being calibrated, which of the following targets will provide the most reliable result? a)the single-cut anterior surface of a high-plus lens b)a perfectly flat highly polished mirror c) a set of steell balls of ...

The first successful contact lenses which were originally molded to conform to the shape of the cornea were known as - Scleral/Haptic lenses Corneal contact lenses: - are the most common design for rigid and gas permeable lenses. The majority of soft lenses fit today are: - semi-scleral A liquid coming in contact with a hydrophilic lens material with a relatively small wetting angle would be likely to: - spread evenly over its surface A contact lens with diameter larger than that of th...

A Correct Statement regarding epithelial cells is that they: a)Comprise the posterior layer of the cornea b)Are unable to regenerate c)Comprise the thickest layer of the cornea d) Have the ability to reproduce - Answer d) have the ability to reproduce Which of the following prescriptions indicates against-the-rule astigmatism? a)-4.50 +1.00 x75 b)-4.50 +1.00 x 180 c)-4.50 -1.00 x 165 d)4.50 -1.00 x 180 - Answer a)-4.50 +1.00 x75 When a keratometer is being calibrated, which of ...