Abstract:
This article investigated the personal satisfaction of wearing Columbia resin CR-39 ophthalmic lenses in Khartoum state; it investigated comfort, durability and safety of such lenses. The investigation was carried out by questionnaire on 304 subjects. Participants' ages ranged between 5 and 65 years with a mean of 32.22�12.81 years, 178 males versus 126 females. The collected data were analyzed using the statistical package SPSS. The results revealed that significant element of comfort 96% in vision was noted in using CR.39 ophthalmic lenses, in addition to 99.7% of the subjects stated that CR.39 lenses have light weight compared with ophthalmic glass lenses; however 89.5% users clearly stated that durability was poor for those type of lenses; while 96% of the participants pointed that the lenses were safer compared to the ophthalmic glass lenses. It was found that scratches were the main cause of lens colour changes p=0.001 and visual blurring p=0.007, however; spectacles, cases were found to be a significant cause of scratches. Self selection for clear CR-39 among other types of lenses, has a significant role in discomfort p=0.046; 81.9% of participants had chosen plastic lenses by themselves, while 83.1% preferred plastic for their new spectacles. The causes for changing spectacles were found to be scratches (93%) and discomfort (80%). Blurring of vision was found to be in 57.6% and colour changes were 41.1% of the studied group. Based on evaluation by participants the study concluded that CR.39 lenses are comfort, safe compared to glass lenses. However, due to scratches they have short durability
