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Visian ICL length calculated with Orbscan versus Pentacam
Session Title: Phakic IOL Implantation II
Session Date/Time: Wednesday 09/10/2013 | 08:00-10:30
Paper Time: 08:57
Venue: E104-105 (First Floor)
First Author: : H.Li CHINA
Co Author(s): :
To study the difference of Visian ICL length calculated mainly based on Orbscan and Pentacam for Chinese patients with high myopia.
Department of Ophthalmology, Xinhua Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
We had a shift from Orbscan to Pentacam for the calculation of Visian ICL length. 167 eyes of 85 patients were measured with Orbscan, with a mean age of 28.5 years and the mean spherical equivalent was -14.04 ± 4.48D. 160 eyes of 84 patients were measured with Pentacam, with a mean age of 29.3 years and the mean spherical equivalent was -15.08 ± 5.07D.
The mean size of Visian ICL calculated with Pentacam were longer than that with Orbscan (P = 0.000). In the Orbscan group, ICL mean length was 118.17 ± 3.07 mm (110mm: 2eyes; 115mm: 67 eyes; 120mm: 88 eyes; 125mm: 10 eyes). In the Pentacam group, ICL mean length was 119.84 ± 3.09 mm (115mm: 33 eyes; 120mm: 99 eyes; 125mm: 28 eyes). The vaults were higher in the Pentacam group than Orbscan group ( 442± 126?m, 487± 147?m, P = 0.000). In the Orbscan group, after Visian ICL implantation, the IOP was higher than the preoperative IOP ( pre-op: 14.4± 3.2mmHg; post-op: 15.3± 2.7mmHg, P = 0.000), the corneal endothelial cells were not changed (pre-op: 2883± 269; post-op: 2868± 234, P = 0.491). In the Pentacam group, after Visian ICL implantation, the IOP was not changed ( pre-op: 15.3± 2.4mmHg; post-op: 15.1± 3.2mmHg, P = 0.395), the corneal endothelial cells decreased (pre-op: 2840± 217; post-op: 2791± 219, P = 0.002).
For determing the length of ICL Visian, Pentacam tends to choose longer ICL than Orbscan.