Visual Acuity Assessment
Ophthalmology · Topic 1
Source: NMC CBME Curriculum 2024 · Volume III · Ophthalmology · Topic 1 · combined PDF page 414
Practice questions
- Which statement best describes what visual acuity quantitatively characterizes?
- Under DIN EN ISO 8596, which optotype is specified as the standard for visual-acuity assessment?
- A clinic changes from a Landolt C chart to a Snellen chart but keeps optotype font size and stroke width identical. Which conclusion best reflects the ISO review?
- A researcher wants to quantitatively relate results from a clinical optotype chart to Landolt C results. Which resource described in the standards review addresses this?
- In a clinical study, investigators want to reduce bias in visual-acuity outcomes. Which approach is best supported by the ETDRS review?
- A multicentre trial uses visual acuity to assess treatment success. Which procedural feature is most important for preserving validity across sites?
- A 2-year-old child is being assessed for near visual acuity. According to the systematic review, which method is the method of choice for this developmental age?
- For which age range does the near-acuity review report available norms for preferential-looking assessment?
- A 5-year-old child is not yet able to read letters. Which near-acuity chart does the systematic review recommend?
- A 6-year-old child can identify LEA symbols but cannot name them reliably. Which response format is compatible with the recommended test?
- For a child aged 10 years undergoing near-acuity testing, which method does the systematic review recommend?
- In children aged 8–13 years, how did near letter acuity compare with symbol acuity in the systematic review?
- A study compares near acuity measured with gratings, symbols, and letters. Which ordering is reported in the systematic review?
- Two clinics obtain different near-acuity results in the same child using different charts and viewing distances. Which interpretation is most appropriate?
- When documenting a child’s near-acuity measurement to allow comparison at follow-up, which set of details is specifically recommended for reporting?
- Why may near-acuity measurement be relevant when considering rehabilitation inclusion for a visually impaired child?
- Which test is described as an objective alternative for estimating visual acuity, particularly when a patient cannot provide a reliable verbal response?
- In VEP-based acuity assessment, which stimulus strategy is described in the review?
- Which patient group is specifically identified in the VEP review as a potential use case for objective acuity assessment?
- A caregiver asks whether a mobile visual-acuity application can be useful outside a clinic. Which conclusion is most consistent with the systematic review?
- In a study of children aged 3–17 years who could follow instructions, how closely did Peek Acuity measurements correlate with standard clinical methods overall?
- In the Peek Acuity comparison study, what examination issue was noted among preschool-aged children?
- In the child study of Peek Acuity, which statement best describes its sensitivity for detecting decreased vision?
- A clinician is considering Peek Acuity as a screen for referable ocular disease in children. Which study result is most accurate?
- A mobile acuity test gives a positive result in a population aged 6–22 years. In the meta-analysis, what was the pooled specificity of app tests versus clinical acuity tests for this age group?
- Which age group in the mobile-app meta-analysis had a reported pooled specificity of 0.98?
- Which conclusion about mobile-app examiners is supported by the meta-analysis?
- Which statement best reflects the relationship between smartphone-based and iPad-based visual-acuity testing in the meta-analysis?
- A public-health team proposes a mobile app for visual-impairment screening. Which interpretation of the evidence is most appropriate?