IOL master more accurate in silicone oil-filled eyes

The IOL master is more accurate than A-scan immersion biometry in silicone oil (SO)-filled eyes, claims a study in Eye.

Dr P. Kunavisarut et al., Department of Ophthalmology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand, conducted a prospective, consecutive, non-randomized investigation on 34 SO-filled eyes of 34 patients. All patients underwent a pars plana vitrectomy with SO removal and cataract surgery, as well as IOL implantation.

Axial length (AXL) was measured before SO removal using both A-scan immersion and IOL master. AXL was also measured three months after SO removal using IOL master. The accuracy of both techniques was determined by a mean postoperative AXL and reliability was determined by mean actual postoperative refractive error.

The preoperative mean AXL was 23.91±0.24 mm and 23.71±0.59 mm by the IOL master and A-scan immersion, respectively. The IOL master gave a postoperative mean AXL of 23.90±0.23 mm, which was statistically significant, compared with A-scan immersion.

At a range of −14.62 to 16.41 D predictive postoperative refractive error was greater in A-scan immersion, which was a statistically significant difference compared to the IOL master.

Overall, the IOL master is more accurate and has less deviation in predictive postoperative refractive error then A-scan immersion in SO-filled eyes.

The abstract can be read here.