Quality of Vision questionnaire is comprehensive

The Quality of Vision (QoV) questionnaire enables the comprehensive assessment of the subjective vision quality, claims a study in the journal Optometry and Vision Science.

The group managed by Dr Colm McAlinden, School of Medicine, Flinders Medical Centre and Flinders University, Adelaide, South Australia, Australia, gathered data from four studies giving a total of 1930 completed questionnaires. The patient groups included spectacle wearers, contact lens wearers, post-laser refractive surgery, cataract patients and patients who underwent lens implantation surgery.

Three subscales of the questionnaire, frequency, severity and bothersome, were used in conjunction with the Bland-Altman limits of agreement (LoA) to assess interchangeability.

Mean difference, standard deviation of the differences, and the LoA for the frequency compared to the severity subscale were 2.8570, 6.784 and -10.4397 to 16.1537, respectively.

Mean difference, standard deviation and the LoA for frequency compared to bothersome were 5.4674, 12.5768 and -19.1831 to 30.1179, respectively. For the severity compared to the bothersome subscale these values were 2.6104, 9.4444 and -15.9006 to 21.1213, respectively.

The three subscales of the QoV questionnaire were useful for measuring different aspects of quality of vision. Practitioners should use all three subscales of the questionnaire to achieve the most comprehensive results on quality of vision.

The abstract can be found here.