March 2013
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10 Reads
AIM: To explore the significance of contrast sensitivity (CS) for diabetic retinopathy (DR) between the stage of pan retinal photocoagulation (PRP). METHODS: A total of 49 case (87 eyes) of DR was divided into three stages by the fundus fluorescein angiography (FFA), the first group was the stage of non-proliferative diabetic retinopathy (NPDR) (25 eyes), the second group was the stage of pre-proliferative diabetic retinopathy(PPDR) (27 eyes), the third group was the stage proliferative diabetic retinopathy (PDR) (35 eyes). 532nm laser was used to have PRP for the PPDR and PDR groups, and retreated for 3-4 times, the CS and eye sight was performed around the stage of PRP. RESULTS: After the laser, the eye sight was increased in 22 eyes, decreased in 6 eyes and unchanged in 34 eyes. There were significant differences around the stage of PRP in CS. The differences in middle and high frequency were significant (P<0.05) between the control group and the laser group before PRP. After PRP, low and middle frequency had no significant difference (P>0.05) between PPDR and control group, and each frequency had significant difference (P<0.05) between PDR and control group. CONCLUSION: CS is an important method of evaluation of the changes the DR, and can become the guiding and proof of PRP in the treatment of DR.