Título / Title

A COMPARATIVE STUDY OF MICROPERIMETRIC RETINAL SENSITIVITY THRESHOLD ON CHOROID NEVI LOCATED ON THE POSTERIOR POLE OF THE EYE FUNDUS VERSUS THE THRESHOLD OF ADJACENT HEALTHY RETINA.

Introdução / Purpose

To compare the microperimetric retinal sensitivity threshold on choroid nevi located in the posterior pole of the fundus versus the threshold of normal retina adjacent to these nevi

Material e Método / Methods

Nine patients diagnosed with a choroid nevus were submitted to a comprehensive ophthalmological evaluation that included measurement of best corrected visual acuity (BCVA), fundus photographs, optical coherence tomography with emphasis on enhanced depth imaging, and microperimetry in the region of the nevus and in a healthy adjacent region of the same eye using 4-2 strategy to calculate the sensitivity threshold at each site analyzed.

Resultados / Results

All nine patients exhibited a choroidal nevus located between the arcades and with a mean (± SD) vertical diameter of 2.2± mm and a mean horizontal diameter of 2.3± mm. All nevus showed reduced sensivity when compared to the sensitivity of the healthy area of the same eye. The mean (± SD) microperimetric retinal sensitivity threshold on the nevus was 20.06dB and it differed significantly from retinal sensitivity on adjacent retinas 24.95dB(p=0.01; t test). At the 6-month follow-up visit, the sensitivity comparison between the nevus area and the healthy retina, maintained the same statistical results as the baseline. There was no correlation between the mean area of nevus and the decrease in retinal sensitivity. (p>0.05).

Discussão e Conclusões / Conclusion

Microperimetric retinal sensitivity threshold over the nevus is significantly lower than retinal sensitivity on healthy adjacent areas of the same eye.

Palavras Chave

choroidal nevi, microperimetry