Retinal function affected early in Type 1, 2 diabetes

One of the tests that your eye care professional will order is the optical coherence tomography, which is a type of photo that can look at the many different layers of the tissues in the eye. This test will map and measure the retinal function especially if you are diabetic.
By Shreeya Nanda, Senior medwireNews Reporter
Visual dysfunction manifests early in Type 1 and Type 2 diabetes, research shows, with functional impairment detected in patients with nonproliferative diabetic retinopathy lacking clinical signs and symptoms of diabetic macular edema.
Researcher Giuseppe Querques (University Vita Salute San Raffaele, Milan, Italy) and team used spectral domain optical coherence tomography and microperimetry to evaluate central foveal thickness (CFT) and retinal sensitivity, respectively, in 36 eyes from the same number of patients with Type 1 (n=17) or Type 2 diabetes (n=19). The average age of patients in the former group was 36.0 years and that of the latter was 63.9 years.
The results were compared with those from two control groups, matched for age and gender, such that the control groups for the Type 1 and Type 2 cohorts had mean ages of 32.3 and 57.1 years, respectively.
Patients with diabetes had a significantly higher overall mean CFT than controls, at 246.2 µm versus 220.7 µm. The difference remained statistically significant when patients with Type 1 and Type 2 diabetes were considered separately and compared with their respective control groups, with mean CFTs of 234.5 µm versus 218.8 µm and 256.3 µm versus 222.8 µm, respectively
Overall mean retinal sensitivity was significantly lower in the diabetes compared with the control group, at 18.3 dB and 19.9 dB, respectively. Considered separately, patients with Type 1 and Type 2 diabetes had mean retinal sensitivities of 18.9 and 17.7, respectively – and again these were significantly lower than the values obtained for the younger and older control groups, at 19.9 and 19.8, respectively……..
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Source: News Medical