Impact of XXXX surgery on visual acuity and subjective functional outcomes: a population-based study in Sweden.

@entity1 @entity227 @entity231
PURPOSE: First, to determine the effects of @entity231 surgery on subjectively experienced @entity227 in a defined population, at a specific frequency of surgery. Secondly, to validate questionnaire data regarding the visual function of @entity231 @entity1 . METHODS: A prospective population-based investigation of the subjective visual functional and visual acuity outcomes of @entity231 surgery over a 1 year time interval at one institution was conducted. All operated cases (n = 459) were grouped into three levels of @entity227 , according to the preoperative visual acuities of their better eyes. Subjective reading, TV watching, distance estimation and ability to orientate in unfamiliar surroundings, before and after surgery, were assessed using self-administered questionnaires. The subjective outcomes were related to the subjects' post-operative visual acuities. The statistical evaluations comprised analyses of variance, Yates'-corrected chi-squared tests, weighted kappa and correlation statistics. RESULTS: The pre-operative subjective @entity227 of the @entity1 were significantly correlated with the pre-operative visual acuities of the @entity1 ' better eyes. There was an improvement in subjective reading ability, distance estimation and ability to orientate in unfamiliar surroundings for most @entity1 at all three pre-operative visual acuity levels. After surgery there was a stronger correlation between the subjective functional improvement and the increase in visual acuity for the operated eye than for the better eye. CONCLUSIONS: An incidence of @entity231 surgery of 3.3 per 1000 population for the year the present study was conducted seems not to be an over-utilisation of resources. Irrespective of the visual acuity level before @entity231 surgery, the vast majority of @entity1 gain better subjective visual function and better acuity after surgery. It is possible to gain valid information from @entity231 surgery @entity1 using a short questionnaire.
