<em><strong>Objective:</strong></em> To determine of the changes in the photoestress recovery time through the test of glare in Type II diabetic patients, with more than five years of diagnosis and healthy patients. <em><strong>Methods:</strong></em> We chose the convenience sample, which evaluated 100 patients divided into two groups each of 50 subjects. The case group or diabetic patients type II and the healthy group. Glucometria test, the visual acuity test , ophthalmoscopy and glare test was making, after standardization of the tests, information was collected optical and health brigades in Bogotá DC. <em><strong>Results:</strong></em> The average recovery time to photostress in diabetic patients was 33,57seconds, and healthy patients were 24,09 seconds. Values photostress were within the range and limit of normal, 15 to 35 seconds. There were significant differences (p = 0,02565) in the average recovery time photostress between to male and female healthy and diabetic population. Diabetic patients showed a greater recovery time, between 8.33 and 11.33 seconds, than healthy subjects. <em><strong>Conclusions:</strong></em> Diabetic patients don’t have alterations in the recovery time to photostress, however, this time was significantly greater than of healthy subjects in this study.

In the occupational environment as a result from diverse industrial processes, the workers are exposed to different compounds containing toxic metals as the chrome and lead, causing high risk of occupational diseases and affecting the ecosystem. The present article is a review on the toxic metals lead, chrome III and chrome VI and its effects on the human health. A brief description is included also on the nature of these elements, how they contaminate the environment, how occurs the exposure, and some safety precautions are compiled to minimize it.