First experiences with intraocular lens calculation using no biometric formulas
Session Details
Session Title: Presented Poster Session: FLACS & Surgical Devices
Venue: Poster Village: Pod 1
First Author: : G.Nemeth HUNGARY
Co Author(s): :
Abstract Details
Purpose:
The primary error of calculating intraocular lens (IOL) is the imperfect estimation of effective lens position by biometric formulas. The aim was to compare the results of a regular planning and a new method using no formulas on an own patient group.
Setting:
Borsod-Abaúj-Zemplén County Central Hospital and University Teaching Hospital, Miskolc, Hungary.
Methods:
Cataract operation were performed on 373 eyes. In the case of the group 1 (n=168), Hill-RBF method was used to calculate the diopter of the IOL, while in the group 2 (n=205), it was calculated by formula SRK/T. The differences between the subjective postoperative refractive error and the planned refractive error was calculated in both groups, as well as the ratio of eyes inside ±0.5 D of non-planned postoperative refractive error. In group 1, the differences of the diopter of the IOLs between the theoretically calculated (SRK/T formula) and the Hill-RBF method derived, implanted IOL were also calculated.
Results:
The mean age of the patients (69.28±11.01 years), the anterior chamber depths (3.15±0.41 mm), and the axial lengths (23.59±1.98 mm) were not significantly different between the two groups (p>0.15). In group 1, the ratio of eyes inside ±0.5 D postoperative, non-planned refractive error was 84.91%, while in group 2, it was 69%. In group 2, the difference was at least 0.5 D in intraocular lens diopter, calculated with the two methods, aiming the same refractive result, was 38.5%.
Conclusions:
Our first results of a new biometric method using artificial intelligence and pattern-recognition, i.e., working with no formula were favorable. Significantly larger ratio of patients achieved postoperative, non-planned refractive error smaller than ±0.5 D.
Financial Disclosure:
None
