Mixed astigmatism - Study guides, Class notes & Summaries

ABO practice exam ophlthalmic optics, Exam Questions And Correct Answers. . Columbia Resin-39. . Lenses that commonly referred to as plastic are made of a material called ___________ a. Zylonite. b. Columbia Resin-39. c. Hivex. d. Polycarbonate. Runs perpendicular to The "normal" is an imaginary line that ________________ the lens surface. a. Refracts through b. Runs parallel to c. Runs perpendicular to d. Reflects off of .Simple hyperopic astigmatism . +3.00 -3.00 x 180 is an indicati...

ABO sample Questions with Complete Solutions When light is refraction by a prism it is: a. Bent toward the apex b, Bent toward the base c. Not bent d. Reflected -Answer-B. Bent toward the base A prism always bends light toward its base. Prisms: I. Always bend light toward the base II. Always bend light toward the apex III. Cause chromatic Dispersion IV. Move the image toward the apex V. Are sometimes prescribed for muscle problems -Answer-I. Always bend light toward base III. Cause...

When discussing thick lenses, the factors which are considered in computing the lens power are: a. front curve, thickness and index b. back curve, thickness and index c. front curve, back curve and thickness d. front curve, back curve, thickness and index - ANSWER-d. front curve, back curve, thickness and index Toric transposition shows: a. lens thickness b. power in principal meridians c. the power of the ADD d. the lens diameter - ANSWER-b. power in principal meridians Increa...

ABO NCLE Exam Questions and Answers 100% Accurate ABO NCLE Exam Questions and Answers 100% Accurate ABO NCLE Exam Questions and Answers 100% Accurate ABO NCLE Exam Questions and Answers 100% Accurate The refractive astigmatism indicated by the RX +1.50 -1.75 x 35 is - ANSWER-Mixed The patient's RX is -1.75 -.50 x 120 with a +2.00 ADD standard trifocal. What is the power through the intermediate? - ANSWER--.75 -.50 x 120 The Geneva lens measure is designed to me...

When discussing thick lenses, the factors which are considered in computing the lens power are: a. front curve, thickness and index b. back curve, thickness and index c. front curve, back curve and thickness d. front curve, back curve, thickness and index - ANSWER d. front curve, back curve, thickness and index Toric transposition shows: a. lens thickness b. power in principal meridians c. the power of the ADD d. the lens diameter - ANSWER b. power in principal meridians Increa...

accommodation - the process by which the eye's lens changes shape to focus near or far objects on the retina Irregular astigmatism - A refractive condition caused by a cornea which is damaged and irregular so that rays of light come to many focal points on the retina; is not correctable by cylinders. posterior chamber - space between the back of the iris and the front of the vitreous chamber; filled with aqueous humor Rods - retinal receptors that detect black, white, and gray; necessa...

Amblyopia is frequently treated with? - Answer-Occluder Lenses When light entering the eye, without corrective lenses, comes to a focus partially in front of the retina and partially back of the retina, the patient's refractive error is __________ ? - Answer-Mixed Astigmatism Visual acuity in not affected by _________ ? - Answer-Interpupillary distance In near sighted eye, incident rays of light form an image __________ ? - Answer-Anterior to the retina The tendency of an eye to dev...

ABO Practice Test| Q-Bank| ABO -American Board of Opticianry) + 400 Questions Solved 100% Correct The angle of incidence, for which the angle of refraction is 90 degrees is called the: a. critical ray b. emergent ray c. angle of reflection d. critical angle {Answer: - d. critical angle When parallel incoming rays strike a convex mirror, the reflected rays: a. are made convergent b. seem to focus in front of the mirror c. seem to originate from behind the mirror d. are reflected p...

NCLE Advanced Certification Exam Questions With Correct Answers Latest 2024 (GRADED) 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...

What type of visual error is indicated by this Rx? Rx +2.00 -1.00 x 090 a. simple hyperopia b. compound hyperopic astigmatism c. compound myopic astigmatism d. mixed astigmatism - ANSWER-b. compound hyperopic astigmatism Increasing the diameter of a minus power lens always increases its: a. vertex power b. center thickness c. weight d. refractive index - ANSWER-c. weight The optical center of a round segment is located: a. at the very top of the segment b. in the geometric cente...