Table 1
Equivalent grating, Snellen and mirror distance acuities for different ages
| Age (days) | Teller acuity (cycles/degree) | Snellen acuity equivalent | Mirror distance (cm) (fixation/reflected distance (2×)) | 95th percentile lower confidence limit (cm) |
| 1.29 (31 h) | 0.33 | 6/540 | 15.5 (31) | 13 (26) |
| 14.1 (2 weeks) | 1 | 6/180 | 38.2 (76.4) | 24.5 (49) |
| 43.7 (6 weeks) | 2 | 6/90 | 57.2 (115) | 37 (74) |
| 79.4 (11 weeks) | 3 | 6/60 | 72.5 (145) | 47 (94) |
| 126 (4.2 months) | 4 | 6/45 | 85.5 (171) | 55.5 (111) |
| 177 (5.8 months) | 5 | 6/36 | 97.5 (195) | 62.5 (125) |
| *512 (17 months) | 10 | 6/18 | 147 (294) | 93.5 (187) |
| *2951 (8 years) | 30 | 6/6 | 279 (558) | 180.5 (361) |
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↵* Extrapolated beyond the age range of the study subjects.
