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Purpose
To evaluate changes in effective range of focus in presbyopic eyes after Laser Scleral Microporation (LSM).
Methods
An Er:YAG laser was used in 4 quadrants on the sclera to improve pliability & biomechanical efficiency of the ciliary muscles in 5 critical zones in 40 eyes of 20 patients. Ray-tracing aberrometer and double-pass wavefront were used to objectively measure visual acuity, higher-order aberrations (HOA), depth of focus (DoF), the visual Strehl ratio based upon the optical transfer function (VSOTF), true accommodation, pseudoaccommodation, and the effective range of focus.
Results
Ray-tracing technology can objectively measure dynamic accommodation as well as specific lens behavior. LSM provided improvement in both accommodative ability and near visual acuity. Early results demonstrate that patients received up to 1D in improvement in true accommodation at 1 month postoperatively. Positive changes after the LSM procedure were also seen in both spherical aberration and DoF. Pseudoaccommodation from changes in spherical aberration and increased depth of focus may contribute to near vision functionality.
Conclusion
Early clinical trial results suggest LSM to be a safe and effective procedure for restoring range of visual performance in presbyopes. Early results also suggest that LSM can improve intermediate and near visual acuity without touching the visual axis. Data collection is ongoing.
To evaluate changes in effective range of focus in presbyopic eyes after Laser Scleral Microporation (LSM).
Methods
An Er:YAG laser was used in 4 quadrants on the sclera to improve pliability & biomechanical efficiency of the ciliary muscles in 5 critical zones in 40 eyes of 20 patients. Ray-tracing aberrometer and double-pass wavefront were used to objectively measure visual acuity, higher-order aberrations (HOA), depth of focus (DoF), the visual Strehl ratio based upon the optical transfer function (VSOTF), true accommodation, pseudoaccommodation, and the effective range of focus.
Results
Ray-tracing technology can objectively measure dynamic accommodation as well as specific lens behavior. LSM provided improvement in both accommodative ability and near visual acuity. Early results demonstrate that patients received up to 1D in improvement in true accommodation at 1 month postoperatively. Positive changes after the LSM procedure were also seen in both spherical aberration and DoF. Pseudoaccommodation from changes in spherical aberration and increased depth of focus may contribute to near vision functionality.
Conclusion
Early clinical trial results suggest LSM to be a safe and effective procedure for restoring range of visual performance in presbyopes. Early results also suggest that LSM can improve intermediate and near visual acuity without touching the visual axis. Data collection is ongoing.
View More Presentations from this Session
This presentation is from the session "SPS-107 Presbyopia Correction II" from the 2020 ASCRS Virtual Annual Meeting held on May 16-17, 2020.