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Symposium: Update on Snellen Acuity Testing

Visual Acuity Charts for Clinical Research

Pages 14-18 | Published online: 05 Apr 2018

References

  • Early Treatment Diabetic Retinopathy Study: Manual of Operations. Baltimore, ETDRS Coordinating Center, Maryland Medical Research Institute, 1980, ch. 12, pp. 1–15.
  • Bailey I, Lovie J: New design principles for visual acuity letter charts. Am J Optom Physiol Opt 1976; 53:740.
  • NAS-NRC Committee on Vision: Recommended standard procedures for the clinical measurement and specification of visual acuity. Adv. Ophthalmol. 1980; 41:103.
  • Sloan L, Rowland WM, Altman A: Comparison of three types of test target for the measurement of visual acuity. Q Rev Ophthalmol 1952; 8:4.
  • Ferris F, Sperduto R: Standardized illumination for visual acuity testing in clinical research. Am J Ophthalmol 1982; 94:97.

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