Comparing methods of determining addition in presbyopes.

摘要: Background: The use of plus lenses to compensate for the reduction in range accommodation associated with presbyopia, brings near point a comfortable distance visual tasks. Our aim was compare tentative addition determined using most common procedures final prescribed presbyopic patients. Methods: Sixty-nine healthy subjects mean age 51.0 years (range 40 60 years) were studied. Tentative additions seven different techniques: dynamic retinoscopy, amplitude (AA), age-expected addition, binocular fused cross-cylinder and without myopisation, duochrome, balance negative positive relative accommodation. power then refined arrive at addition. Results: higher than every procedure except initial myopisation ageexpected methods. These biases small clinical terms (less 0.25 D) exception AA (0.34 D). intervals between 95% limits agreement differed substantially always ±0.50 D. Conclusions: All techniques used displayed similar behaviour provided close addition. Due wide observed, likelihood error is high supports idea that any has be adjusted according particular needs each patient. Among methods examined here, we would recommend procedure, as this technique produced results correlated best