What is the primary function of a focimeter?, Measure intraocular pressure, Determine the refractive error of the eye, Measure the power of ophthalmic lenses, Assess visual acuity, In a manual focimeter, what is the purpose of the prism holder?, To measure spherical power, To adjust the axis of cylindrical lenses, To measure prismatic power, To align the lens in the optical path, Which of the following describes a disadvantage of manual focimeters?, Higher cost of maintenance, More time-consuming and dependent on operator's skill, Inability to measure spherical lenses, Inability to measure cylindrical lenses, Which part of a manual focimeter allows for the measurement of spherical and cylindrical lens power?, Protractor ring, Lens table, Reticule, Power drum, Which part of a manual focimeter allows the measurement of the cylinder axis?, Eyepiece, Axis adjustment knob, Prism holder, Lens holder, What is the lens power: +3.50DC x 180, +1.75DC x 90, +3.50/ -2.75 x 90, +3.50/ -2.75 x 180, +1.75/ -2.75 x 90, +1.75/ -2.75 x 180, What is the lens power: -4.25DC x 140, -2.75DC x 50, -2.75/ -1.50 x 50, -2.75/ -1.50 x 140, -4.25/ -1.50 x 140, -4.25/ -1.50 x 50, What is the lens power: -4.25DC x 35, +1.00DC x 125, +1.00/ -5.25 x 125, +1.00/ -3.25 x 125, +1.00/ -5.25 x 35, +1.00/ -3.25 x 35, How far does patient need stand when performing visual acuity test, 1m, 6m, 12m, 20m, Who can have their visual acuity tested?, Children, Seniors, Adults, Baby, Can we accurately state the patient's power using visual acuity test?, True, False, Can we only estimate the patient's power using visual acuity test?, True, False, Can we perform a visual acuity test on babies?, Yes, No, What does 6/12 vision mean?, you can see at 6 meters what a person with normal vision should be able to see at 6 meters., it means that at 6 meters, you can only see what a person with normal vision can see from 12 meters away, you can see at 6 meters what a person with normal vision would need to be 4 meters away to see, it means that you are not colour blind, Which charts are used to test Visual Acuity?, Snellen chart, Tumbling E chart, Lea's chart, Ishihara chart, What are some limitations of Snellen chart, Simple, Relies on letter recognition, Cost effective, Doesn't asses all aspects of vision, Widely available, What are Plano Lens used for?, Used to satisfy and identify malingering patient, Used to check patient myopia, Used to check patient astigmatism, Used to close one of patient eye, What is Red & Green Filter used for?, Used for checking color blindness, Used to check patient astigmatism, To detect and evaluate eye suppression, diplopia, fusion, and squint, Used to check patient depth preception, What is Maddox Rod used for?, used to check for refractive error, used to check for color blindness, used to check patient astigmatism, used to find out the presence of heterophoria or heterotropia, What are crosshair lens used for?, to detect eye misalignment such as strabismus, used to check for color blindness, used to check for refractive error, Are frosted lenses used to replace opaque lenses in case of active accommodation and accommodative nystagmus?, True, False, Which is an incorrect characteristic of Jackon Cross Cylinder (JCC), Usually, the cross cylider are of +-0.25 or +- 0.50, Used to determine both cylindrical power and axis, Spherical equivalent is zero, It is a combination of two cylinders of unequal strength, Which are trial frames?, Full aperture frame, Reduced aperture frame, Fix PD trial frame, Half eye trial frame, All of the above, Select all the disadvantages of trail frame below, Time consuming and basic technique for eye testing, Can’t measure IPD, Easily become dirty with fingerprint and dust, It is portable, space saving, How many types of retinoscopes are there?, 1, 2, 3, 4, Why do we use retinoscope?, To get the estimated sphere power and cylinder power, Useful for young children and infants, Use for patient who cannot give response, To determine the final RX, What is the function of the collar on the retinoscope?, To measure the refractive error, To controls both meridian (or streak rotation) and vergence (or streak focus), To projects a slit beam of light from one side of the head, Change the direction of light and hence confirm reversal, What is the working lens for 66.7cm working distance?, +2.00D, +1.75D, +1.50D, +1.25D, For Emmetropia, the emerging ray will be, Parallel, Converging, Diverging, Random, What happens to the reflex if the patient has high power?, Slow, wide and bright, Slow, narrow and dim, Fast, narrow and dim, Fast, wide and bright, Which other ophthalmic instruments have the same function as retinoscope?, Phoropter, Lensometer, Keratometer, Autorefractor, Select the correct statement, The far point for hyperopia is beyond infinity, There were 3 types of retinoscope, The final RX doesn't need to be refined with subjective refraction, The light will be narrow when the power is low

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