Optometry (Questions with 100% correct answers)

Light is bent (refracted) primarily by the ______________ correct answers Cornea Light is bent (refracted) secondarily by the _______ correct answers Lens Light is focused onto the __________ which contains specialized neural cells called photoreceptors to process light and change it into a chemical signal which is transmitted through the visual pathway. correct answers Retina Majority of the light is focused onto the ___________ -> clearest portion of vision. correct answers Macula Chemical signal exits the eye via the ___________________. correct answers Optic Nerve (CN II) Which lobe is involved in visual processing?? correct answers The Occipital Lobe The ability to clearly see an image at near involves a process known as ____________________ which is controlled by CN III (Oculomotor Nerve). correct answers Accomodation Testing Visual Acuity: Distance _________ ft vs. Near ________ cm correct answers Distance - 20 ft Near - 40 cm Equipment used to cover the eye correct answers Occluder Snellen Fraction 20/20 correct answers Test Distance/Letter Size: document the smallest row of letters on the visual acuity chart where the patient was able to correctly identify half or more of the letters ______________ condition in which the image is not clear correct answers Refractive Error Hyperopia correct answers Farsightedness (Distance can be seen clearly, but close ones do not come into proper focus). Some people may not notice any problems with their vision, especially when they are young. With significant hyperopia - vision can be blurry for objects at any distance, near or far. Myopoia correct answers Nearsightedness, Most Common refractive error of the eye, cornea is too curved for the length of the eyeball (see close objects clearly, but can not focus on objects further away). Light comes to focus in front of the retina instead of on the retina. Astigmatism correct answers Irregularly shaped eyeball leading to improper focus of objects. Does not focus light evenly onto the retina - images appear blurry and stretched out.