Purpose. To evaluate the evolution of retinal and disk lesions in pts affected by DP. Methods. 50 pts (69 eyes) were included; 34 (68%) were females; mean age was 49.5 yrs±16.8 and mean duration of diabetes 13.2 yrs±7.8; 29 (58%) were insulin-dependent; high blood pressure coexisted in 29 (58%) pts. The lesion was bilateral in 19 (38%) pts; the optic disc involvement sectorial in 41 (59.4%) eyes. In 10/46 (21.7%) eyes in which visual field exam was performed, only a slight blind spot enlargement was observed. The coexisting diabetic retinopathy (DR) was absent in 4.3% of cases, nonproliferative in 55%, preproliferative in 34.8%, proliferative in 5.9%. Results. We followed 38/50 pts (54 eyes) for a mean period of 52.7 mos±34.1. The initial visual acuity was 0.67±0.30 and the final 0.58±0.32. The mean time between diagnosis and regression of DP was 6.2 mos±3.4. In 16/54 eyes (29.6%) DP reappeared during the follow-up: in 18.5% in the same sector and in 11.1% in different sectors of optic disc. With regard to the evolution of DR, 46.1% of the eyes showed a progression of retinal lesions during the follow-up; in 10.7% of cases a proliferative stage occurred. Conclusions. DP turned out to be associated with preproliferative DR in a high percentage of cases. It is possible to speculate that DP is a consequence of lesions localized at the level of the third retinal capillary layer; the characteristics of this network could justify a specific involvement in cases of impaired blood flow, as typically present in the preproliferative stage of DR.
|Journal||Investigative Ophthalmology and Visual Science|
|Publication status||Published - Feb 15 1996|
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