RT Journal Article
SR Electronic
T1 Effect of long-term rigid gas-permeable contact lens wear on keratoconus progression
JF British Journal of Ophthalmology
JO Br J Ophthalmol
FD BMJ Publishing Group Ltd.
SP 186
OP 190
DO 10.1136/bjophthalmol-2020-315942
VO 105
IS 2
A1 Satoko Araki
A1 Shizuka Koh
A1 Daijiro Kabata
A1 Ryota Inoue
A1 Daichi Morii
A1 Naoyuki Maeda
A1 Ayumi Shintani
A1 Vishal Jhanji
A1 Kohji Nishida
YR 2021
UL http://bjo.bmj.com/content/105/2/186.abstract
AB Background/aims To investigate the chronological corneal changes associated with long-term rigid gas-permeable contact lens (RGP-CL) wear in patients with keratoconus (KC).Methods Clinical records of 405 patients with KC or with KC suspect were retrospectively reviewed. Patients with mild-to-moderate KC and uneventful follow-up were classified into the CL (RGP-CL wear) and non-CL (without CL wear) groups. Inclusion criteria were (1) at least 3-year follow-up and (2) Scheimpflug-based corneal imaging examination at each visit. The anterior (ARC) and posterior (PRC) radius of curvature obtained in a 3.0 mm optical zone, the thinnest pachymetry reading of the corneal thickness (Tmin), and maximum keratometry values (Kmax) were investigated as tomographic parameters.Results Twenty-two and 15 patients who met the inclusion criteria were included in the CL and non-CL groups, respectively (31 and 20 eyes, respectively). The mean observation periods were 75 (CL group) and 63 (non-CL group) months. A multivariable non-linear regression analysis to assess the change in tomographic parameters over the follow-up period and difference of the trend between the two groups demonstrated no significant differences in the chronological change in ARC, PRC and Tmin between the CL and non-CL groups (p=0.318, p=0.280 and p=0.874, respectively).Conclusion Based on corneal tomographic evaluation over 5–6 years, the effects of long-term RGP-CL wear had no effect on KC progression.