Frequency and distribution of drusen in the fovea, parafovea and perifovea in 21 healthy participants with small hard drusen in at least one eye on colour fundus photographs
| Age (years) Mean (SD) | Eyes with drusen | Drusen within 0°–2° (%) | Drusen between 2° and 5° (%) | Drusen between 6° and 10° (%) | |
| All (21) | 23.2 (4.5) | 27 | 10.2 | 37.3 | 52.5 |
| Male (8) | 25.4 (6.4) | 10 | 6.8 | 18.6 | 33.9 |
| Female (13) | 21.9 (2.0) | 17 | 3.4 | 18.6 | 18.6 |