The application of rigid gas permeable contact lenses after surgery for infantile nystagmus syndrome

The purpose of this study is to investigate the improvement in visual acuity when applying Rigid Gas Permeable Contact Lenses (RGPCL) compared to spectacles in patients after surgical treatment for infantile nystagmus syndrome (INS). A total of 33 patients with nystagmus who had nystagmus surgery from October 2020 to July 2021 were enrolled and all were fitted RGPCL. SPSS statistical software was used to analyze the difference between best-corrected visual acuity with spectacle(BCSVA) and best-corrected visual acuity with RGPCL (BCRVA) in these patients. According to the refractive status of each eye, it was grouped into 2 groups. We study the difference between its BCSVA and BCRVA in different groups. In our study, BCRVA was significantly better than BCSVA in all participants (P < 0.001), with a strong positive correlation between them (overall r = 0.9333). In Group A (SE ≥ -3.00D, 15 eyes), the difference was significant (P = 0.0018), while in Group B (SE < -3.00D, 27 eyes), the difference was highly significant (P < 0.001). However, there was no significant difference in corrective visual acuity between the two groups (P = 0.5934). The mean difference between BCRVA and BCSVA was - 0.1160 ± 0.1221 in all participants, with similar differences in both groups. These findings suggest that BCRVA and BCSVA are closely related but with significant differences. The results of our study show that for patients who have undergone surgery for INS, RGPCL provide better best-corrected visual acuity compared to spectacle correction. This holds true for patients with high myopia, low myopia, and hyperopia. We recommend the use of RGPCL for refractive correction in patients after surgery for INS.