Effects of Resting State of Accommodation Regarding Prescription for Contact Lenses and Glasses
Many individuals with asthenopia or indefinite complaints wear overcorrected contact lenses and glasses. Because these complaints appear after long-term use of these lenses, it is difficult for practitioners not only to determine that the complaints are due to the overcorrection but to treat the patients when the cause is found. The purpose of this study was to determine why overcorrection is prescribed and how to avoid the overcorrective prescription. We analyzed overcorrected powers in such patients who have consulted us recently. The mean overcorrection was about -1.5 diopters. The overcorrection was close to their resting states of accommodation. Our results suggest that most of the overcorrection is due to the comfortable vision experienced by the patients when the glasses empowered their accommodative resting state.