Presbyopia: Causes and Prevalence
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Questions and Answers

At what age can childhood presbyopia develop?

  • Around 20 years old
  • Around 30 years old
  • Around 50 years old
  • Around 40 years old (correct)

    • What is the measure used to determine vision impairment severity?

  • Refraction
  • Visual acuity (correct)
  • Visual field
  • Pupillary response

    • What does the numerator of a visual acuity fraction represent?

  • The size of the letters on the chart
  • The distance at which the chart is viewed (correct)
  • The distance at which a 'healthy' eye can read a line
  • The type of vision chart used

    • According to the World Health Organization, what is the name of the report that provides information on vision and presbyopia?

    <p>World Report on Vision</p> Signup and view all the answers

    At what distance is a vision chart typically viewed?

    <p>6 metres</p> Signup and view all the answers

    What is the term for presbyopia that develops earlier in life due to environmental conditions?

    <p>Early onset presbyopia</p> Signup and view all the answers

    What is the estimated market share of Essilor in the lenses market?

    <p>45%</p> Signup and view all the answers

    What percentage of the global eyewear market is accounted for by lenses?

    <p>39%</p> Signup and view all the answers

    Which company is the leading provider of frames?

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

    What is the estimated value of the global eyewear market?

    <p>USD130 billion</p> Signup and view all the answers

    What percentage of Essilor's revenue comes from LMICs?

    <p>Less than 10%</p> Signup and view all the answers

    What is the price range of prescription eyeglasses in private optical companies in LMICs?

    <p>USD50 to USD200</p> Signup and view all the answers

    What is the purpose of the Tiered system of payment in the Service Centres?

    <p>To generate revenue from the sales of eyeglasses</p> Signup and view all the answers

    What is the role of the Vision Technicians in the primary eye care setup?

    <p>To provide basic eye care services</p> Signup and view all the answers

    What is the estimated number of comprehensive eye exams conducted at the primary level?

    <p>50,000</p> Signup and view all the answers

    What is the main advantage of DOT Glasses' supply chain?

    <p>Only 5 different corrective powers</p> Signup and view all the answers

    What is the primary source of funding for the primary eye care services?

    <p>Sales of eyeglasses</p> Signup and view all the answers

    What is the material used to create frames in the OneDollarGlasses model?

    <p>Flexible spring steel</p> Signup and view all the answers

    What is the main difference between a Tertiary Centre and a Centre of Excellence?

    <p>Range of services offered</p> Signup and view all the answers

    What is the purpose of the Centre of Excellence?

    <p>All of the above</p> Signup and view all the answers

    What is the limitation of OneDollarGlasses and TwoBillionEyes products?

    <p>Varying levels of quality and limited customization options</p> Signup and view all the answers

    What is the advantage of Peek Vision's smartphone-based vision screening app?

    <p>It is as accurate as conventional paper-based vision tests</p> Signup and view all the answers

    What is the feature of Peek Solutions that aids in follow-up appointments?

    <p>Text message reminders in the local language</p> Signup and view all the answers

    What is the benefit of new technologies for vision screening and refraction?

    <p>They create opportunities to reach more people</p> Signup and view all the answers

    What is the main benefit of using Peek Acuity in a school screening programme in Kenya?

    <p>It nearly triples the number of children who attend follow-up appointments</p> Signup and view all the answers

    What is the primary purpose of Peek Vision's consulting support to its partners?

    <p>To help identify programme gaps and optimise programme design</p> Signup and view all the answers

    What is a characteristic of handheld refraction devices adapted to low-resource settings?

    <p>They can be operated by a technician with minimal training</p> Signup and view all the answers

    What is the technology used by promising handheld autorefractors?

    <p>Wavefront aberrometry technology</p> Signup and view all the answers

    What is the approximate cost of a handheld autorefractor?

    <p>USD 4,000 to USD 7,000</p> Signup and view all the answers

    What is the purpose of Peek Solutions' population-based data analysis?

    <p>To optimise programme design and identify challenges in the pathway to care</p> Signup and view all the answers

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