Résumé
To compare corneal hysteresis and resistance factor after penetrating keratoplasty [PK] and deep anterior lamellar keratoplasty [DALK] using Anwar's big-bubble technique using the ocular response analyzer. Forty-five PK eyes and 23 DALK eyes with keratoconus were compared in terms of corneal hysteresis [CH], corneal resistance factor [CRF], Goldmann-correlated intraocular pressure [IOPg] and cornea-compensated IOP [IOPcc]. Mean age was 29.8 +/- 6.1 years in the PK group and 27.2 +/- 6.5 years in the DALK group [P=0.11]; patients were followed for 31.4 +/- 19.0 and 29.2 +/- 17.3 months after corneal transplantation, respectively [P=0.27]. There was no significant difference between the study groups in terms of recipient [P=0.21] and donor [P=0.57] trephine size or BSCVA [P=0.77]. Mean CH was 10.09 +/- 2.5 mmHg in the PK group and 9.64 +/- 2.1 mmHg in the DALK group [P=0.36]; mean CRF was 10.13 +/- 2.2 and 9.36 +/- 2.1 mmHg, respectively [P=0.17]. No significant difference was found between the study groups in terms of IOPg [P=0.25] and IOPcc [P=0.80]. PK and DALK techniques provide comparable graft biomechanics in keratoconic eyes