Posters

Biometrical iris eye recognition with cyclorotational control eye tracker system increases the safety and precision in excimer laser procedure

Poster Details

First Author: B.Pajic SWITZERLAND

Co Author(s):    Z. Cvejic   Z. Mijatovic   D. Indjin   J. Mueller           

Abstract Details

Purpose:

A prospective comparative study assessing the importance of the intra-operative dynamic rotational tracking—especially in the treatment of astigmatisms in corneal refractive Excimer laser correction—concerning clinical outcomes is presented

Setting:

Eye Clinic ORASIS, Swiss Eye Reseach Foundation, Reinach AG, Switzerland

Methods:

We measured and adjusted the eye tracker system in LASIK treatments on a total of 88 eyes in this study, 44 eyes with rotational tracker in Group 1 and 44 eyes with only X/Y tracker system in Group 2. The mean cylinder was -1.14 ± 1.00 D (range -5.75 to 0.00 D) in Group 1 and -1.12 ± -1.0 D (range -6.00 to -0.00 D) in Group 2. There was no significant difference between the groups regarding the mean preoperative spherical equivalent and cylinder refraction (p > 0.05).

Results:

Significant differences were observed between the groups regarding the mean postoperative cylinder refraction (p < 0.05). The mean cyclotorsion can be calculated to 3.75° with a standard deviation of 3.1°. The total range of torsion was from -14.9° to +12.6°. Re-treatment rate was 2.2% in Group 1 and 8.2% in Group 2, which is highly significant (p < 0.01). The mean cylinder was -0.08 ± 0.05 D (range -0.5 to 0.0 D) in Group 1 and -1.08 ± 0.75 D (range -2.25 to 0.0 D) in Group 2.

Conclusions:

The investigation confirms that the dynamic rotational tracking system used for LASIK results in highly predictable refraction quality with significantly less postoperative re-treatments

Financial Disclosure:

None