Clinical analysis of the change of optic axial length after glaucoma surgery

Objective To investigate the change of optic axial length after glaucoma surgery so as to provide reference for the accurate measurement of the intraocular lens in intraocular hypertension state.Methods The changes of intraocular pressure and optic axial length after glaucoma surgery in 19 patients were analysed.Results In 19 patients with glaucoma treated with glaucoma surgery,postoperative average intraocular pressure ( 15.20 ± 2.66mmHg),comparing with the average intraocular pressure (60.27 ± 10.60 mmHg) before surgery,there was significant difference (t =19.15,P =0.000),and the postoperative average optic axial length (21.86 ± 0.80) mm,comparing with the average optic axial length (22.28 ±0.81 mm) before surgery,there was significant difference ( t =49.19,P =0.000).The average intraocular pressure difference was (45.07 ± 10.26) mmHg and average optic axial length difference was (0.42 ± 0.04) mm before and after surgery.Conclusion High intraocular pressure can cause the increase in opticaxial length.For patients suffered from secondary glaucoma due to intumescent cataract whose preoperative intraocular pressure is uncontrollable,intraocular pressure factors should be taken into account when measuring optic axial length,in order to avoid the refractive accident of intraocular lens after operation. Key words: Intraocular pressure ;  Glaucoma ;  Surgery ;  Optic axial length