eQuizShow
Eye Got It!
Focus on it
Question: The Wavelength of light makes a difference in how the eye perceives it. Which characteristic of visible light is determined by its wavelength?
Answer: color
Question: Which color has the longest wavelength? The shortest?
Answer: Longest: Red 650-750nmShortest: violet 400-446nm
Question: Two prisms placed base-to-base form the basis of what type of lens?
Answer: Convex (plus)
Question: "With the rule" astigmatism is corrected by plus cylinders at or near what axis?
Answer: 90 degrees
Question: When using a streak retinoscope, if you see "against" motion, this indicates the need to place what kind of lens power in front of the eye?
Answer: minus power
Movers and Shakers
Question: Simultaneous movement of both eyes in the same direction is calle
Answer: Versions
Question: A constant ocular deviation caused by extraocular muscle imbalance is called
Answer: tropia
Question: What treatment is used to correct a strabismic amblyopia?
Answer: patching the good eye to force the amblyopic eye to work harder
Question: To test the inferior rectus muscle, the patient needs to look _____ and ______.
Answer: down and out
Question: All of the extraocular muscled, except the inferior oblique, orginate at the ___________ ___ ________.
Answer: Annulus of Zinn
Restricted Access
Question: Where in the visual field is the physiologic blind spot?
Answer: 15 degrees temporal to fixation
Question: What arae the peripheral limits of a normal visual field?
Answer: 60* nasal, 60* superior, 70* inferior, 90*temporal
Question: Which method of perimetry is the most widely used and is essentially a screening test?
Answer: confrontation
Question: Which ganglion fibers of the retina cross through the center of the chiasm into the opposite lateral optic tract?
Answer: the nasal fibers
Question: What is the benefit of using a blue stimulus on a yellow background in automated perimetry?
Answer: Earlier detection of visual field loss
That's Fitting!
Question: A parasite organism found in hot tubs, swimming pools, or contaminated water, which can cause serious infections in those who wear contact lenses is called...
Answer: Acnthamoeba
Question: What is always the first step with insertion or removal of any contact lens?
Answer: Thoroughly wash your hands
Question: The measurement from one edge of the contact lens to the opposite side is called..
Answer: total contact lens diameter (chord diameter)
Question: What is the instrument used to measure the curvature of the cornea?
Answer: ophthalmometer (keratometer)
Question: Name 5 factors that cause corneal edema from contact lenses?
Answer: Flat lens causing compression of the corneasteep lens causes stagnation of tears
poorly centered lens causes pressure in one area
improper blinking
improper cleaning of lens
The Pressure's On
Question: One of the first and oldest methods used to determine IOP is...
Answer: tactile(finger)tension
Question: What is the name of the tonometer that consists of a footplate with a central movable plunger fitted into a barrel?
Answer: Schiotz tonometer
Question: A calibration bar is used to check the calibration of the GOldmann tonometer and is checked at what settings?
Answer: 0, 2, 6
Question: If there are too little tears or fluorescein, the applanation pressure reading may be too ____
Answer: Low
Question: If the prism is not aligned properly at the axis of the minus cylinder, an incorrect IOP reading may be obtained if the cornea has ______ of astigmatism or more.
Answer: 3 diopters