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23. [Correlation of letter optotypes with Landholt ring for different degrees of visual acuity]. Rassow B, Wang Y. Klin Monbl Augenheilkd; 1999 Aug; 215(2):119-26. PubMed ID: 10483562 [Abstract] [Full Text] [Related]
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36. Chart construction and letter legibility/readability. McMonnies CW. Ophthalmic Physiol Opt; 1999 Nov; 19(6):498-506. PubMed ID: 10768033 [Abstract] [Full Text] [Related]
37. Validation of a computerised logMAR visual acuity measurement system (COMPlog): comparison with ETDRS and the electronic ETDRS testing algorithm in adults and amblyopic children. Laidlaw DA, Tailor V, Shah N, Atamian S, Harcourt C. Br J Ophthalmol; 2008 Feb; 92(2):241-4. PubMed ID: 17993577 [Abstract] [Full Text] [Related]