Assessment of contrast sensitivity loss after intrastromal femtosecond laser and LASIK procedure

作者：Mai Elsa L C; Lian Ie Bin; Chang David C K^*

来源：International Journal of Ophthalmology, 2016, 9(12): 1798-1801.

DOI：10.18240/ijo.2016.12.16

• INTRACOR
• LASIK
• contrast sensitivity
• intrastromal femtosecond laser

AIM: To assess the loss of contrast sensitivity (CS) function for INTRACOR or intrastromal femtosecond laser presbyopia procedure to conventional LASIK procedures.
METHODS: Patients were recruited from a refractive surgery center for either INTRACOR or conventional LASIK. INTRACOR was performed on 8 eyes and LASIK was performed for 40 eyes in an overlapping period. Preoperative evaluation and post-operative follow up for up to three months was done. Drops of CS in 4 spatial frequency (3 cpd, 6 cpd, 12 cpd and 18 cpd) right before and 3mo after the surgery were compared by Wilcoxon signed ranks test.
RESULTS: For INTRACOR, CS threshold showed significant drop at both glare and non-glare condition, the drop was seen in all 4 spatial frequency. The averaged loss over the 4 spatial frequencies 3mo after surgery was 1.18 for non-glare and 0.71 for glare. For LASIK the CS threshold drop was most significant in 12 cpd for glare.
CONCLUSION: INTRACOR procedure produces a gain of near vision for presbyopia patients but also introduces a high lost of contrast sensitivity plus worsen of vision quality. Pre-surgical patient selection and advise should be given with specific regards to night driving and glare conditions.

• 出版日期2016-12-18