AIM: To evaluate the changes of vault and contrast sensitivity after implantable collamer lens(ICL)implantation in high myopia.

METHODS: The clinical data of 15 patients(30 eyes)were collected. The patients' average age was 28.0 years(from 20 to 40 years). Preoperative spherical refraction was(-6.50 to -22.50)D(mean -11. 05±2.50)D. The vault was measured with optical coherence topography(OCT), after operation 6mo, 1, 2, 3a; and the contrast sensitivity function was measured with vision testing instrument after operation 1 and 3a.

RESULTS: The results revealed that the vault was decreased after operation 6mo which was the highest. There was statistical difference between 6mo and 3a. While the contrast sensitivity was no statistical difference after operation between 1a and 3a and was all in the normal value.

CONCLUSION: The vault was decreased after ICL implantation in high myopia with years, but the contrast sensitivity was no obvious change. A long-time observation for the vault and contrast sensitivity should be performed.