12 Questions
What is the focus of the Best Focus Principle in optometry?
Achieving highest contrast during target focus on the Retina
What characteristics of the Fundus Reflex are being observed during the optometric principle?
Direction of motion and speed of motion compared to the Incident beam
How does mild defocusing on the Retina affect image contrast?
Diminishes contrast level
In cases of Emmetropia, what happens to the images of a target?
They are focused properly on the Retina and achieve highest contrast
What does auto-reflection in optometry involve?
Measuring fundus image size at different meridians for refractive error calculation
How is refractive error calculated using auto-reflection in optometry?
Based on ocular magnification and minification compared to Emmetropia
What is the first step in the autorefractor testing procedure?
Positioning the patient's head on the chin rest and forehead rest
What needs to be done once the image of the patient's eye is focused on the monitor?
Position the square at the pupil reflex
How is the final reading for refractive error determined?
By averaging three different readings
What happens when the capture button is pressed during autorefractor testing?
Infra-red rays are bounced off from the retina to determine refractive power
What is the purpose of moving the joystick during autorefractor testing?
To adjust the view of the patient's eye on the monitor
Which area of the eye should the square be positioned at once the image is focused on the monitor?
Pupil reflex
Test your knowledge on the optometric principle also known as the retinoscopy principle. Explore topics such as fundus reflex characteristics, direction and speed of motion, and achieving neutralization through the best focus principle.
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