Exploring the Effect of Preoperative Stereopsis on Visual Outcomes in Hyperopic Presbyopes Treated with PresbyOND® Laser Blended Vision Micro-Monovision

Abstract

We investigated the effects of Laser Blended Vision (LBV) on binocular summation and stereopsis in the treatment of presbyopia and hyperopia. Using a unidirectional, retrospective longitudinal design, data from 318 patients who underwent the Zeiss PresbyOND® LBV surgical procedure at Tecnolaser Clinic Vision Ophthalmology Center in Seville, Spain, were analyzed. The findings indicate that stereopsis quality significantly influenced short-term post-operative visual outcomes in measures like Uncorrected Distance and Near Visual Acuity (UDVA and UNVA). However, the impact of stereopsis on visual outcomes appeared to diminish over time, becoming statistically insignificant at the 12-month post-operative mark. The study suggests that while stereopsis is a crucial factor in the short term, its influence on visual outcomes tends to wane in the long-term postoperative period. Future studies are essential to elucidate the enduring clinical ramifications of these observations.

Outcomes of Corneal Compound Myopic Astigmatism with Presbyopia by Zeiss PRESBYOND® Laser Blended Vision LASIK Using Default CRS-Master® Target Refractions for Reduced Anisometropia

“…Although our study has the limitation of not measuring postoperative stereopsis, Reinstein et al [36] published results where 68% of patients had postoperative stereopsis of 100 s of arc or better, and 93% had 200 s of arc or better, and Brar et al [27] obtained similar results: all patients had stereopsis of 140 s of arc or better, and 70% of patients had stereopsis of 60 s of arc or better. Our research team has also explored how preoperative stereopsis influences outcomes in hyperopic patients undergoing PRESBYOND ® surgery, finding that its impact on visual results tends to diminish over the long term [37]. Other limitations of this study include incomplete annual follow-up, the absence of VA better than 20/20, the lack of contrast sensitivity measurement, and not performing the validated questionnaire that assesses vision and quality of life.…”