Optic zone - Study guides, Class notes & Summaries

Fluorescein is a valuable tool in evaluating the lens to cornea relationship of a rigid gas permeable lens. A special type of fluorescein (fluorosoft) should be used to evaluate the fitting relationship of a soft contact lens. If the diagnostic rigid gas permeable lens placed on the eye results in minimal movement, which of the following will increase the movement on the lens ordered for the patient? A. Decreasing overall lens diameter B. Increasing overall diameter C. Increasing optic z...

Application of fluorescein should be used in which of the following situations? A. Evaluation of a rigid gas permeable (RGP) lens fit B. Evaluation of soft contact lens parameters C. Evaluation of vascularization of the cornea D. Evaluation of rigid gas permeable lens over-refraction - ANSWER-A. Fluorescein is a valuable tool in evaluating the lens to cornea relationship of a rigid gas permeable lens. A special type of fluorescein (fluorosoft) should be used to evaluate the fitting rel...

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...

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 Practical Questions and Answers Verified A+ Steep Fluorescein Pattern - Bright green pooling center, very faint green pooling on diameter of lens Flat Fluorescein Pattern - Bright green pooling on diameter of lens, very faint green in center Against-the-rule Astigmatism Pattern - Bright green pooling horizontally, faint green pooling vertically With-the-rule Astigmatism Pattern - Bright green pooling vertically, faint green pooling horizontally Pri...

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 curvature is decreased ...

Define neuroscience the study of the brain and how it functions Localization of functioning Brainpower Read More Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:03 / 0:15 Full screen Equipotentiality theory Lashley's integrated theory what is neuropsychology study between behavior and the brain 4 zones of the neuron input zone, integration zone, conduction zone, output zone 3 parts of the cell soma, axons, dendrit...

How do RGPs improve visual optics? : They are able to fill the gaps and neutralise corneal irregularity. What is the first diagnostic clue to keratoconus? : Observations made during retinoscopy -Scissoring reflex -Charleux oil droplet sign How to do retinoscopy on a keratoconic patient? : Use any portion of the ret-reflex that seems to be more distinct/brighter and attempt to neutralise it. How to refract a keratconic patient? : -Use LARGE steps according to just noticeable difference...

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