Table 1. Primary indications for retinal examinations, distributions per modality, and distribution of examinations with normal results.
| Indications | Total | Dilated fundus exam | Color fundus photography | p value† | Normal |
|---|---|---|---|---|---|
| n (%) | (%)* | (%)* | n (%) | ||
| Late postoperative period of ocular surgery‡ | 66 (3.8) | 74.2 | 25.7 | 0.333 | 0 (0) |
| Myopia greater than -3.00 diopters | 123 (7.1) | 84.5 | 15.4 | 0† | 4 (2.4) |
| Investigation of systemic diseases§ | 67 (3.9) | 79.1 | 20.9 | 0.064 | 12 (7.2) |
| Low visual acuity to be determined/”single eye”¶ | 121 (7) | 81 | 19 | 0.003† | 10 (6) |
| History of retinal disease|| | 280 (16.2) | 71.1 | 28.9 | 0.376 | 20 (12) |
| Preoperative evaluation# | 36 (2.1) | 66.7 | 33.3 | 0.777 | 3 (1.8) |
| History of ocular trauma | 14 (0.8) | 57.1 | 42.8 | 0.343 | 3 (1.8) |
| Retinal toxicity** | 25 (1.4) | 68 | 32 | 0.928 | 7 (4.2) |
| Diabetes | 409 (23.8) | 71.6 | 28.3 | 0.16 | 57 (34.3) |
| Glaucoma†† | 406 (23.6) | 49.7 | 50.2 | 0† | 17 (10.2) |
| Hypertension | 114 (6.6) | 80.7 | 19.2 | 0.005† | 11 (6.6) |
| No apparent indication | 58 (3.4) | 72.4 | 27.5 | 0.548 | 22 (13.2) |
| Total | 1,719 (100) | 166 (100) |
* Dilated fundus exams added to color fundus photographs total up 100% in each category; † significant differences (p<0.05); ‡ except late postoperative period of phakectomy with no complications; § with possible involvement of the posterior ocular segment, except for diabetes and hypertension; ¶ patient presenting with useful vision in one eye only; || personal or family history, complaint or clinical picture consistent with ocular disease ocular with possible involvement of the posterior segment, except for diagnosis or investigation of primary open-angle glaucoma or high myopia; # phakectomy or capsulotomy; ** use of oral medication with potential retinal toxicity; †† diagnosis or investigation of primary open-angle glaucoma.