What is refractive power - Study guides, Class notes & Summaries

Certified Paraoptometric Questions and Answers 2024/2025 (Verified Answers) Already Passed. An optometrist is licensed by which governing body? State The person generally responsible for grinding or duplicating lenses is the ________. Optician An instrument worn on the examiners head and used to view the back of the eye is call a/an _______. Binocular indirect opthalmoscope Kerat (root word) Cornea A test that does not require responses from the patient is called a/an __________ test. Ob...

emmetropia correct answers optical state of the eye in which parallel light enters the eye and focuses on the retina without the need for any corrective lenses or accommodation; this is the absence of refractive error and the "normal" or ideal state of the eye ametropia correct answers refractive error, "abnormal" optical state of the eye in which parallel light rays enter the eye and focus on an area other than the retina; this condition requires corrective lenses to produce clear retina...

CPO PRACTICE CARDS EXAM QUESTIONS AND VERIFIED CORRECT ANSWERS LATEST UPDATE 2024/2025 GRADED A+ What is true of a trifocal lens? a. Trifocal lenses are usually made of glass b. Has three different lens powers c. Has three different tints for lenses d. The middle lens is for reading a book b. Has three different lens powers What does a pachymeter measure? a. Pressure in the eye b. Thickness of the cornea c. Refractive power of the eye d. Curvature of the cornea b. Thickness of the ...

JCHAPO COT QUESTIONS AND ANSWERS ALREADY PASSED 79 Y/O female is taking medication for POAG and has a syncopal episode, and is found to have a pulse rate of 36 beats per minute. Which glaucoma medication is most likely the cause? Acetazolomide/ Diamox A contact lens fit "steeper than K" is defined as corneal measurement of 44.00 diopters and the contact lens curvature could be 44.5 diopters A difference in pupil size is called anisocoria A lens formula of +2.00 -3.00 x 90 degre...

Light is electromagnetic energy with ____ frequency and a ______ shorter wavelength Higher then shorter fiber optics transmission takes place in _____ portion of the light spectrum IR A simple fiber optic System consist of what 4 parts Transmitter, fiber optic cable, receiver, connecters What absolute power is Dbm referenced to 1 milliwatt Absolute power in optical fiber is specified as Dbm Attenuation in optical fiber is lowest at what wavelength 1550 What are the three most common wave...

Optician ABO Exam Questions and Answers 100% Pass - Answer- 'A' measurement, 'B' measurement, and geometrical center - Answer-what does the boxing system find 1 inch = - Answer-25.4 mm 1 meter = - Answer-39.37 inches 1.53 - Answer-the refractive index to which Optical tools and gauges are calibrated is 1.66 - Answer-refractive index of hi index 1.66 1.74 - Answer-refractive index of hi index 1.74 1.498 - Answer-refractive index of cr-39 1.523 - Answer-the index of refraction of cro...

ABO Test (American Board of Opticianry) | Correct Questions and Answers When light enters the eye, what ocular structure does it interact with first? [Correct ANs: - Cornia Approximately how much power can be generated by the eye's optical system? [Correct ANs: - 60 Diopters An eye that focuses light rays in front of the retina instead of the retina is called [Correct ANs: - Myopic +2.25D is an example of what type of prescription? [Correct ANs: - Hyperopic (myopia is - ) A convex ...

Who is the father of microscopy? Antonie van Leeuwenhoek Lamp: produces visible light to illuminate the specimen Condenser: collects light and directs it through the stage opening (converges or focuses the rays of light to a single point) Iris diaphragm: regulates the amount of light available to the objective lens Factors that affect microscope function: Resolving power, numerical aperture, magnification, working distance Resolving power: ability of a microscope to differentiate two ...

The instrument that contains lenses and can be used to determine a spectacle correction is called a phoropter. A. True B. False CORRECT ANSWER-A. True What does a pachymeter measure? A. Pressure of the eye B. Thickness of the cornea C. Refractive power of the eye D. Curvature of the cornea CORRECT ANSWER-B. Thickness of the cornea What can be used to facilitate the bending of frames? A. Salt pan B. Frame warmer C. Both a & b D. None of the above CORRECT ANSWER-C. Both a & b Wh...

ABO study-Optician Amblyopia is frequently treated with? - 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 __________ ? - Mixed Astigmatism Visual acuity in not affected by _________ ? - Interpupillary distance In near sighted eye, incident rays of light form an image __________ ? - Anterior to the retina The tendency of an eye to deviate f...