Retinoscopy PPO2
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Questions and Answers

What is the main goal of retinoscopy?

  • Evaluate the peripheral vision of the patient
  • Determine the distance refractive status of the patient’s eyes (correct)
  • Measure the patient's intraocular pressure
  • Locate the near point of the spherical eye
  • Which retinoscopy method allows for more accurate cylinder axis and power determination?

  • Spot retinoscopy
  • Streak retinoscopy (correct)
  • Photorefractor
  • Automated refractor
  • What is the purpose of bringing the patient’s far point to a predetermined distance during retinoscopy?

  • To facilitate subjective refraction (correct)
  • To determine the retinal condition
  • To measure intraocular pressure
  • To enhance peripheral vision
  • Which retinoscope type is known for being more accurate and fast?

    <p>Copeland retinoscope</p> Signup and view all the answers

    What distinguishes a Streak retinoscope from a Spot retinoscope?

    <p>Presence of meridional axis control</p> Signup and view all the answers

    Which part of the retinoscope is responsible for controlling the brightness of the reflex?

    <p>Optical head</p> Signup and view all the answers

    What is the primary function of the battery handle in a retinoscope?

    <p>Provides power to the optical head</p> Signup and view all the answers

    Which type of retinoscopy requires external light source and is very fast for estimation?

    <p>Photorefractor</p> Signup and view all the answers

    What is the purpose of using trial lenses and a trial frame in the eye examination process?

    <p>To verify distance and near prescriptions accurately</p> Signup and view all the answers

    At what range can the refractor or phoropter typically adjust for sphere lenses?

    <p>±0.12D to ±20.00D</p> Signup and view all the answers

    What type of lenses are used in Mohindra's Set Up for retinoscopy screenings?

    <p>Loose lenses</p> Signup and view all the answers

    What is used to determine refractive error without the input of the patient in an eye examination?

    <p>Mohindra Retinoscopy</p> Signup and view all the answers

    Which instrument is best suited for checking astigmatic axis and power in an eye examination?

    <p>Jackson cross cylinder</p> Signup and view all the answers

    What is the main reason for using a Retinoscope light with an intensity enough to observe the reflex but still keep the patient comfortable?

    <p>To conduct objective retinoscopy comfortably</p> Signup and view all the answers

    What is the primary purpose of using prisms during an eye examination?

    <p>To assess phorias and vergences</p> Signup and view all the answers

    Why are trial lenses and a trial frame particularly useful for examining children and bedridden patients?

    <p>To verify distance and near prescriptions accurately</p> Signup and view all the answers

    What is the purpose of determining the power of the eyes in a refraction?

    <p>To determine the refractive error</p> Signup and view all the answers

    What is one of the common sources of error in retinoscopy?

    <p>Failure to recognize the scissors motion</p> Signup and view all the answers

    Why is it important to measure interpupillary distance before ordering spectacle lenses?

    <p>To ensure proper alignment of the lenses with the eyes</p> Signup and view all the answers

    In retinoscopy, what happens if the patient fails to fixate on the distance target?

    <p>Dynamic retinoscopy occurs</p> Signup and view all the answers

    What is the significance of obtaining reversal in retinoscopy?

    <p>To assess astigmatism accurately</p> Signup and view all the answers

    Which instrument is commonly used to measure interpupillary distance?

    <p>Millimeter rule (PD ruler)</p> Signup and view all the answers

    What is one of the potential errors in retinoscopy related to working distance?

    <p>Failure to remove the working distance</p> Signup and view all the answers

    How does looking at a patient during retinoscopy affect the procedure?

    <p>It causes accommodation, leading to dynamic retinoscopy</p> Signup and view all the answers

    What does a smooth “full moon” of red over the retina indicate in photorefraction paraxial photorefraction?

    <p>Normal vision</p> Signup and view all the answers

    In photorefraction paraxial photorefraction, what does a bright half moon over the top of the pupil indicate?

    <p>Myopia</p> Signup and view all the answers

    What is indicated by a brighter crescent moon in the bottom half of the eye in photorefraction paraxial photorefraction?

    <p>Hyperopia</p> Signup and view all the answers

    When conducting myopia hyperopia photorefraction with 3 photos at different axial planes, what is determined by taking the 1st photo at 75cm?

    <p>Pupil size</p> Signup and view all the answers

    During myopia hyperopia photorefraction, if the pupil is larger at 150cm, what type of eye condition is indicated?

    <p>Hyperopia</p> Signup and view all the answers

    In photorefraction paraxial photorefraction, why are the 2nd and 3rd photos taken at different axial planes and compared?

    <p>To identify myopia or hyperopia</p> Signup and view all the answers

    Which action during myopia hyperopia photorefraction helps differentiate between myopia and hyperopia?

    <p>Determining pupil size at different distances</p> Signup and view all the answers

    What are the most common monochromatic optical aberrations encountered in Keratoconus and PMD?

    <p>Coma and spherical aberration</p> Signup and view all the answers

    In which part of the pupil does neutrality reach first when performing retinoscopy in Keratoconus and PMD?

    <p>Center</p> Signup and view all the answers

    What happens to the refraction of the eye when the pupil dilates in individuals with Keratoconus and PMD?

    <p>Becomes more myopic peripherally</p> Signup and view all the answers

    When confused reflexes are encountered during retinoscopy, what is the recommended approach in Keratoconus and PMD?

    <p>Neutralize the central portion and rely on bracketing</p> Signup and view all the answers

    Which group is more likely to experience 'False Neutrality' in retinoscopy in Keratoconus and PMD?

    <p>Individuals with light irises</p> Signup and view all the answers

    What is the characteristic motion observed during retinoscopy in Keratoconus and PMD?

    <p>'Scissors motion'</p> Signup and view all the answers

    In which part of the pupil does the retinoscopy reflex move more quickly as neutrality is approached in Keratoconus and PMD?

    <p>Center</p> Signup and view all the answers

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