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S. Ghosh, S. Thomas; Assessment of Validity of Visual Function Index (VF-14) Pre Operative and Post Operative in Patients With Vitreo-Retinal Disease, and Measurement of Patient Satisfaction. Invest. Ophthalmol. Vis. Sci. 2009;50(13):6065.
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To assess impairment of normal activities in a sample of patients with newly-diagnosed vitreo-retinal diseases and to measure the improvement in their functional ability after surgery by applying Visual Function-14 (VF-14). This study also aimed to assess the relationship between visual acuity, visual function, importance and satisfaction in the same group of patients.
30 consecutive patients attending the vitreoretinal services were surveyed before and 12 months after their operation with regard to their VF-14 visual function, patient perceived trouble with vision, and visual satisfaction. To assess the validity of VF-14 in vitreoretinal disease, VF-14 score was compared with a single self-rating of overall visual satisfaction, with a single self-rating of overall trouble with vision, and with visual acuity pre- and post-operatively. The same group of patients were asked by a standard questionnaire about their overall importance of factors affecting their care while attending the retinal services unit in the hospital. Post operative the patients were asked about their overall satisfaction of the same factors.
Of the 30 eligible patients, 28 could be contacted post operative for assessment. Average VF-14 (SD) values rose from 72.77 (20.20) to 81.35 (21.51). Fifteen patients (53.57%) out of 28, reported improved functioning after surgery as assessed by the VF-14 score while 10 (35.71%) patients did not show any change in their final score and 3 (10%) patients showed a decrease in their VF-14 score. Twelve (42.85%) patients reported improvement of their trouble with vision, 16 (57.14%) reported their trouble to be the same as before the surgery. None of the patients reported increased post operative trouble with their vision. Seventeen (60.71%) reported improvement in their overall satisfaction with vision after surgery, with 11(39.28%) reporting no change in satisfaction and none of the patients stating a decrease in post operative satisfaction with their vision. The VF-14 showed a moderately strong positive association with patient self rating of amount of trouble, satisfaction, and overall visual acuity.
There was a high rate of patient satisfaction and improvement of functional status after surgery. The VF-14 can be used as a measure of the functional impairment before vitreoretinal surgery and post operatively gives a good measurement of the improvement.
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