Table 1.
95% normal tolerance limit of mean choroidal thickness (MCT) by age and region from 12×12 mm scans. Axial length (AL) = 23.5mm*.
| 95% Normal Range of Choroid Mean Thickness by Each Decade of Age (μm, AL=23.5mm) | |||||||
|---|---|---|---|---|---|---|---|
| Regions Quantified | Age Group | ||||||
| 19-29 | 30-39 | 40-49 | 50-59 | 60-69 | 70-79 | 80-89 | |
| C (2.5-mm circle) | 179.1 - 481.8 | 163.0 - 464.2 | 146.6 - 446.8 | 130.0 - 429.8 | 113.0 - 413.0 | 95.8 - 396.6 | 78.2 - 380.4 |
| 5-mm circle | 190.4 - 449.8 | 173.5 - 431.5 | 156.3 - 413.6 | 138.9 - 395.8 | 121.3 - 378.3 | 103.3 - 361.1 | 85.2 - 344.1 |
| 11-mm circle | 189.7 - 383.2 | 174.7 - 367.2 | 159.6 - 351.5 | 144.3 - 336.0 | 128.9 - 320.6 | 113.2 - 305.5 | 97.4 - 290.5 |
| IQ1 | 157.8 - 456.8 | 143.7 - 441.2 | 129.4 - 425.9 | 114.7 - 410.8 | 99.7 - 396.1 | 84.5 - 381.6 | 68.9 - 367.4 |
| IQ2 | 205.6 - 465.0 | 186.1 - 444.1 | 166.3 - 423.6 | 146.3 - 403.2 | 126.1 - 383.1 | 105.5 - 363.3 | 84.8 - 343.7 |
| IQ3 | 186.6 - 456.2 | 168.1 - 436.4 | 149.3 - 416.8 | 130.3 - 397.4 | 111.1 - 378.3 | 91.5 - 359.5 | 71.8 - 340.9 |
| IQ4 | 158.5 - 443.4 | 143.2 - 426.6 | 127.6 - 410.1 | 111.7 - 393.9 | 95.6 - 378.0 | 79.2 - 362.3 | 62.5 - 346.9 |
| OQ1 | 155.5 - 366.1 | 144.0 - 353.6 | 132.4 - 341.2 | 120.5 - 329.1 | 108.5 - 317.2 | 96.2 - 305.4 | 83.7 - 293.9 |
| OQ2 | 219.1 - 429.2 | 201.1 - 410.1 | 182.9 - 391.2 | 164.5 - 372.5 | 145.8 - 354.0 | 127.0 - 335.8 | 108.0 - 317.7 |
| OQ3 | 175.4 - 371.4 | 161.1 - 356.1 | 146.6 - 340.9 | 131.9 - 326.0 | 117.0 - 311.2 | 102.0 - 296.7 | 86.7 - 282.3 |
| OQ4 | 127.4 - 321.3 | 117.6 - 310.5 | 107.6 - 299.9 | 97.4 - 289.4 | 87.0 - 279.2 | 76.5 - 269.1 | 65.7 - 259.2 |
| 12x12 mm | 185.9 - 360.3 | 172.4 - 346.0 | 158.8 - 331.8 | 145.1 - 317.8 | 131.2 - 304.0 | 117.1 - 290.4 | 102.8 - 276.9 |
*
The MCT were corrected by axial length (AL) as: MCTcorr = MCT − α × AL, where α is 24.9 μm/mm.