IOL CALCULATION FOR HIGHLY MYOPIC EYES, COMPARISSON OF DIFEFERENT PUBLISHED METHODS
- Authors
- Idrobo Robalino, Carlos Alberto
- Format
- MasterThesis
- Status
- publishedVersion
- Description
PURPOSE: To Compare the accuracy of various published methods to improve the IOL calculation in highly myopic patients ( higher than 25 mm) PLACE: Hadassah Ein Keren Hospital, Jerusal?m ? Israel METHODS: Cases with an axial lenght higher than 25 mm to 30 mm which underwent cataract surgery were collected from the database of the Hadassah Ein Keren Hospital, the cases received Phacoemulsification surgery with IOL implant SN60WF, the calculation of intraocular lens (IOL) power was done using optic biometry (IOL Master) and the SRK/T formula. After successful surgery and followup period of minimum 3 weeks, the cases were evaluated by optometry and then a back calculation of the IOL power was done using the SRK/T with optimized A constant of 119,0; SRK/T with 3 IOL personalized constants according to the keratometry, T2 formula, T2 formula with an optimized A constant of 119.0, and Holladay 1 with an optimized surgeon factor of 1.84, the results were compared looking for the more accurate and for concordance between the methods RESULTS: 55 cases (eyes) were obtained, from 38 patients, the most accurate methods according to the median absolute error (MedAE) was SRK/T with an optimized A constant of 119.0 (MedAE: 0.275), followed by SRK/T with the original constant (MedAE: 0.3), SRK/T with 3 personalized constants (MedAE0.31) and T2 formula (MedAE: 0.33), finally the Holladay 1 formula with Optimized Surgeon Factor (MedAE: 0.388) CONCLUSIONS: The results show that the IOL calculation for the SN60WF IOL in highly myopic eyes with the SRK/T formula using an optmized constant of 119.0, the SRK/T formula with 3 personalized A constants according to the keratometry values and the T2 formula show accuracy and concordance and can be used in these cases, A higher amount of cases is necessary to improve the tendency shown in the present sample.
- Publication Year
- 2014
- Language
- eng
- Topic
- MYOPIA
IOL CALCULATION
CATARACT SURGERY
SURGEON FACTOR
- Repository
- Repositorio SENESCYT
- Rights
- openAccess
- License