Intraocular lens power calculation in eyes with keratoconus
| Autor: | Domenico D'Eliseo, Rosa Abbate, Domenico Schiano-Lomoriello, Giacomo Savini, Kenneth J. Hoffer, Aurelio Imburgia, Luca Avoni, Alessandro Mularoni |
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| Rok vydání: | 2018 |
| Předmět: |
Male
Keratoconus medicine.medical_specialty Optics and Photonics Biometry genetic structures Pseudophakia medicine.medical_treatment Visual Acuity Intraocular lens Refraction Ocular law.invention 03 medical and health sciences 0302 clinical medicine Lens Implantation Intraocular law Ophthalmology medicine Humans Dioptre Mathematics Aged Retrospective Studies Lenses Intraocular Phacoemulsification Keratometer medicine.diagnostic_test Corneal Topography Cataract surgery Middle Aged medicine.disease Corneal topography Subjective refraction eye diseases Sensory Systems Axial Length Eye 030221 ophthalmology & optometry Surgery Intraocular lens power calculation Female sense organs 030217 neurology & neurosurgery Tomography Optical Coherence |
| Zdroj: | Journal of cataract and refractive surgery. 45(5) |
| ISSN: | 1873-4502 |
| Popis: | Purpose To assess the refractive accuracy of different formulas for intraocular lens (IOL) power calculation in eyes with keratoconus. Setting IRCCS Fondazione Bietti, Rome, Italy. Design Multicenter retrospective interventional study. Methods A consecutive series of eyes with keratoconus that had cataract surgery were evaluated. Keratometry, anterior chamber depth, and axial length were measured preoperatively with optical biometry; IOL power was calculated with the Barrett Universal II, Haigis, Hoffer Q, Holladay 1, and SRK/T formulas. Subjective refraction was assessed at 1 month. The mean prediction error (PE), median absolute error (MedAE) and percentage of eyes with a PE within ±0.50 diopters (D), ±0.75 D, and ±1.00 D were calculated. Results The final spherical equivalent was −0.52 D ±1.61 (SD). In the whole sample (41 eyes), the mean PE was positive (hyperopic surprise) with all formulas; the lowest PE (0.91 D) and MedAE (0.62 D) were obtained with the SRK/T formula. In stage I eyes (n = 21), the MedAE ranged between 0.43 and 0.91 D; the SRK/T formula achieved the lowest MedAE and the highest rate of eyes with a PE within ±0.50 (61.9%). In stage II eyes (n = 13), the MedAE ranged between 0.75 D and 1.50 D; the SRK/T formula achieved the lowest MedAE and the highest rate of eyes with a PE within ±0.50 (30.8%). In stage III eyes (n = 7), the MedAE was higher than 2.50 D with all formulas. Conclusions In keratoconus eyes, all formulas led to a hyperopic refractive outcome. The SRK/T was the most accurate formula. The results were worse in advanced stages of the disease. |
| Databáze: | OpenAIRE |
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