Comparative study of Lenstar lS900 and modified A ultrasound in measuring the axial length of silicone oil filled eyes

Abstract

Objective To compare the accuracy with Lenstar lS900 and modified A ultrasound measured axial length in the patients with silicone oil filled ocular, and to explore the clinical application value of two kinds of methods. Methods From June 2015 to December 2015, 36 patients (44 eyes with silicone oil filled) were hospitalized for the treatment of cataract surgery in The North theater Army General Hospital. Preoperative and post-operative ocular axial length was measured using Lenstar lS900 and A ultrasound, comparing the differences between the two methods. Comparison was made between the target reservation refractive value with preoperative Lenstar lS900 measuring intraocular lens degree and postoperative 3 months comprehensive optometry results. Results There was no statistical difference between the Lenstar lS900 and the modified A ultrasound in the ocular axis length before operation (P >0.05). And there was no statistical difference in the ocular axial length before and after the operation with Lenstar lS900 (P >0.05). After 3 months of surgery the actual refraction spherical degree and preoperative Lenstar lS900 after the calculation of the reserved values showed no significant difference (P >0.05). Conclusions Compared with the modified A ultrasound, the Lenstar lS900 method is more accurate, safe and convenient to measure the ocular axial length of silicone oil filled complicated cataract eye. It can be widely applied in clinical practice. But for some patients with poor quality of refraction and with poor coordination, the modified A ultrasound is useful in clinic. Key words: Lenstar lS900; the modified A ultrasonic; silicone oil-filled eyes; oculor axial length