Comparison of Postoperative Refraction With Intraoperative Refraction by Intraoperative Wavefront Aberrometer During Cataract Surgery
Narrative Responses:
Purpose
It is increasingly important to achieve the intended refractive result after cataract surgery. This study was conducted to determine the value of intraoperative aberrometry in enhancing the predictability of refractive results.
Methods
In a prospective case series of 134 consecutive eyes that underwent uneventful cataract extraction, the difference between intraop ORA refraction and 1-mo and 3-mo postop refractions was defined as the Settling Factor (SF). The average spherical equivalent (SE) and cylindrical refraction (CR) SFs were calculated for all eyes, virgin eyes, and post-refractive eyes.
Results
SE SF of all eyes was 0.27± 0.88D at 1 mo and 0.29 ±0.89D at 3 mos. Average magnitude of CR SF for all eyes was 0.70 ± 0.51D at 1 mo and 0.72 ± 0.49D at 3 mos. At 1 mo, average SE SF was significantly larger for post-refractive vs. virgin eyes. In assessing results from 134 eyes that underwent routine cataract surgery with intraoperative aberrometry and 1- and 3-mo postop refractions available, intraoperative aberrometry system offered good predictability. Difference in spherical equivalent and cylinder magnitude between intraop and postop measurements was small, particularly in eyes without prior refractive surgery.
Conclusion
The ORA system is reasonably good at predicting postoperative refraction.