Quality of Life

GQoL-15 total score was got after calculate the all subscale values. Subscales are as; 1) Central and near vision (two questions); 2) Peripheral vision (six questions); 3) Dark adaptation (six questions); 4) Outdoor mobility (one question). The item responses for each factor are marked on a five-point scale (1 meaning no difficulty and 5 meaning severe difficulty), 0 is marked if the participant does not perform the activity because of non-visual causes. Higher GQL-15 total scores and subscale scores are reveals lower QoL.

NEI-VFQ 25 total score was got after calculate the all values. It is comprised of 25 items which are; general health and vision, ocular pain, difficulty with vision activities, distance-vision activities, limitation of social functioning, mental health problems, role limitations, dependency on others, driving difficulties, difficulty with color vision and difficulty with peripheral vision. A total score of NEI-VFQ 25 is generated by averaging the scores of all subscales except general health. The item responses for factors are marked on a five or six point scale. Subscale score can be calculated, overall total lower score indicates better vision-related QoL.