Benefit Of Technological Advances In Refractive Lenticular Corneal Surgery

Intrastromal refractive lenticule performed for myopia correction has been proven effective but was limited by non-compensation for cyclotorsion, a required learning curve, and exclusive access on the ZEISS platform (SMILE). A new generation platform aims to overcome these obstacles.

Our study was conducted here using the new VISUMAX800 platform. Each patient underwent a preoperative refractive surgery consultation, wich included an i Tracey exam.

50 patients (100 eyes) with myopia ranging from -0.75 to 7D, combined or not with astigmatism from 0.5 to -3.5 D, underwent bilateral lenticular surgery with the VISUMAX800 model, which offers automated centering and alignment in the case of cylindrical correction. The ergonomics have been improved for better patient comfort, while the energy delivery shortens the procedure from 22 to 10 seconds. The results are studied at 3 months, including visual quality: i.tracey aberrometry, contrast sensitivity, a quality-of-life questionnaire, in addition to refractive and visual changes.

85% of patients are within +- 0.5 D of emmetropia; 5 patients between 38 and 50 years old were targeted for monovision. The correction of astigmatism in terms of vector analysis is in favor of good effectiveness in terms of axis and amplitude of the cylinder. Visual recovery occurs between 2 to 4 days with initial night halos. No interface or peri-operative complications were reported.

The technological adjustments made to the ZEISS platform represent a real breakthrough. The development of lenticular cutting on femtosecond lasers from other manufacturers should lead to competitive emulation and an expansion of the market, including hyperopia.