This randomized, prospective, contralateral clinical trial examined 86 eyes of 43 patients, whose spherical equivalent (SE) ranged from -100 to -800 diopters. Randomization determined the eye of each patient that would receive either PRK with 0.02% mitomycin C or SMILE surgery. selleckchem A battery of tests, encompassing visual acuity measurement, slit-lamp microscopy, manifest and cycloplegic refraction, Scheimpflug corneal tomography, contrast sensitivity assessment, ocular wavefront aberrometry, and a patient satisfaction questionnaire, were administered both preoperatively and during the 18-month follow-up period.
To conclude the study, each group contributed forty-three eyes. An 18-month follow-up revealed comparable outcomes for eyes treated with PRK and SMILE concerning uncorrected distance visual acuity (-0.12 ± 0.07 and -0.25 ± 0.09), safety, efficacy, contrast sensitivity, and ocular wavefront aberrometry. Predictably, PRK-treated eyes displayed a statistically lower residual spherical equivalent in contrast to the outcomes observed in eyes treated with SMILE. The PRK group exhibited residual astigmatism of 0.50 diopters or less in 95% of instances; the corresponding figure for the SMILE group was 81%. A one-month post-operative assessment revealed inferior visual outcomes and foreign body discomfort in the PRK cohort in comparison to the SMILE cohort.
PRK and SMILE emerged as both safe and effective treatments for myopia, displaying comparable clinical outcomes. selleckchem Eyes receiving PRK treatment displayed a lower spherical equivalent and reduced residual astigmatism. In the initial month following SMILE surgery, patients experienced a diminished foreign body sensation and quicker visual restoration.
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The clinical results of PRK and SMILE were strikingly similar, showcasing their effectiveness and safety in treating myopia. A lower spherical equivalent and residual astigmatism was observed in the eyes treated by PRK. Patients' eyes treated with SMILE in the first month exhibited a reduced perception of foreign bodies and a faster restoration of visual function. This JSON schema, composed of a list of sentences, is the desired output. Significant research findings were presented in the 2023 journal, volume 39, number 3, particularly on pages 180 through 186.
Patients undergoing cataract surgery who had an isofocal optic design intraocular lens (IOL) implanted were evaluated for refractive and visual outcomes at varying viewing distances.
An open-label, multicentric, observational study using a retrospective/prospective design assessed 183 eyes from 109 patients who were implanted with the ISOPURE 123 (PhysIOL) IOL. Outcomes were evaluated through assessment of refractive error and monocular and binocular uncorrected distance visual acuity (UDVA) and corrected distance visual acuity (CDVA) at 66cm and 80cm, along with uncorrected intermediate visual acuity (UIVA) and distance-corrected intermediate visual acuity (DCIVA) at the same distances, as well as uncorrected near visual acuity (UNVA) and distance-corrected near visual acuity (DCNVA) at 40cm. We also assessed binocular visual acuity across a range of convergence angles, resulting in the defocus curve. Patient evaluations were not performed until 120 days after their surgical procedures.
The visual acuity results indicated that 90.54% and 98.57% of patients achieved a cumulative binocular UDVA and CDVA value of 20/25 or better, respectively; furthermore, 80.65% and 50.0% of patients exhibited binocular DCIVA values of 20/25 or better at 80 and 66 cm, respectively; and 41.94% of patients achieved a binocular DCNVA value of 20/40 or better. A good depth of field of 150 Diopters was observed, as shown by the through-focus curve, providing excellent visual acuity for far and middle distances. No adverse events were reported.
This isofocal optic design IOL, according to the current study, offers exceptional visual function in both far and intermediate ranges, with an impressively broad spectrum of vision. Providing functional intermediate vision and correcting aphakia, this lens presents an effective solution.
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Superior visual performance for distance vision and effective intermediate vision, demonstrating a broad range, is observed in the current study involving this isofocal optic design IOL. Providing functional intermediate vision and correcting aphakia, this lens presents an effective solution. Please return a JSON schema, complying with the request from J Refract Surg. The schema should include a list of ten distinct sentences. Volume 39, issue 3, of the 2023 publication, featured detailed content spanning pages 150 to 157.
Nine formulas for calculating the power of the AcrySof IQ Vivity (Alcon Laboratories, Inc.), an advanced extended depth-of-focus intraocular lens (EDOF IOL), were assessed for precision, using data obtained from the IOLMaster 700 (Carl Zeiss Meditec AG) and Anterion (Heidelberg Engineering GmbH) optical biometers.
The accuracy of these formulas, after continuous improvement, was assessed in 101 eyes using various instruments: Barrett Universal II, EVO 20, Haigis, Hoffer Q, Holladay 1, Kane, Olsen, RBF 30, and SRK/T. Each formula made use of keratometry measurements, including standard and total keratometry from the IOLMaster 700 and standard keratometry values extracted from the Anterion.
The A-constant's optimized values, while consistently within the 11899-11916 range, were still subtly different according to the calculation formula and the optical biometer. The heteroscedastic test demonstrated a significantly larger standard deviation for the SRK/T keratometry formula, when compared to the Holladay 1, Kane, Olsen, and RBF 30 formulas, within each keratometry modality. The Friedman test, comparing absolute prediction errors, revealed a lower accuracy in the predictions made using the SRK/T formula. Within each keratometry modality, a statistically significant difference emerged, according to the Holm-corrected McNemar's test, regarding the percentage of eyes displaying a prediction error under 0.25 diopters, comparing the Olsen formula with the Holladay 1 and Hoffer Q formulas.
For optimal results with the new EDOF IOL, continuous optimization procedures are necessary; however, the same constant cannot be used across all formula types and both optical measuring devices. Comparative statistical analyses demonstrated a diminished accuracy of older IOL calculation formulas in comparison to modern formulas.
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A key factor for achieving the best possible outcome from the new EDOF IOL is ongoing optimization; avoiding the use of a single constant for all formulas and both types of optical biometers is essential. Various statistical assessments unveiled that older intraocular lens formulas exhibited reduced accuracy compared to the subsequently developed formulas. J Refract Surg. Return this JSON schema: list[sentence] Referring to volume 39, number 3 of 2023, one can discover the content found on pages 158 through 164.
Examining the effect of total corneal astigmatism (TCA) determined using the Abulafia-Koch formula (TCA),
A comparison of corneal curvature measurement approaches, contrasting Total Keratometry (TK) with the combination of swept-source optical coherence tomography (OCT) and telecentric keratometry (TCA).
The impact of toric intraocular lens (IOL) implantation during cataract surgery on resultant refractive outcomes was assessed.
In this single-center, retrospective investigation, the eyes of 146 patients who had cataract surgery with toric IOL implantation (XY1AT by HOYA Corporation) were examined; a total of 201 eyes were considered. selleckchem TCA treatment, for each eye.
Estimating based on the anterior keratometry measurements from the IOLMaster 700 [Carl Zeiss Meditec AG] instrument, and the consideration of TCA.
The IOLMaster 700's results, regarding the measurements, were subsequently input into the HOYA Toric Calculator. TCA criteria determined the surgical procedures applied to the patients.
Using the selected TCA, centroid and mean absolute error in predicted residual astigmatism (EPA) were ascertained for each eye.
or TCA
The schema outputs a list of sentences. Cylinder power measurements and axis determinations of the posterior chamber IOL were compared.
The average uncorrected distance visual acuity was 0.07 to 0.12 logMAR, the average spherical equivalent was 0.11 to 0.40 diopters, and the average residual astigmatism was 0.35 to 0.36 diopters.
At the 148 coordinate, 035 D was found in conjunction with TCA.
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(x) exhibits a statistical significance far exceeding 0.001, clearly supporting a demonstrably valid result.
The observed probability of (y) is an extremely low value, less than 0.01. The mean absolute EPA, in conjunction with TCA, measured 0.46 ± 0.32.
TCA and 050 037 D are combined.
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Under .01, the result was returned. In the astigmatism category that adhered to the rules, TCA treatment resulted in a deviation from the target of under 0.50 Diopters in 68% of eyes.
Different from the outcomes seen in 50% of eyes treated with TCA, the results were.
Discrepancies in the prescribed posterior chamber IOL design emerged in 86% of instances, directly correlating with the different calculation methodologies used.
Both calculation techniques displayed a high degree of effectiveness, resulting in superior outcomes. In contrast, the variability in the projected values was substantially lessened through the employment of TCA.
Rather than using TCA, the alternative was selected.
Each member of the cohort was measured using the IOLMaster 700. TK's estimation of TCA surpassed the actual value within the astigmatism subgroup that adhered to the rule.
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Both calculation procedures yielded outstanding outcomes. When comparing TCATK measurements from the IOLMaster 700 to TCAABU measurements, a noticeable and significant reduction in predictability error was observed across the entire cohort. With regard to the astigmatism subgroup complying with the rule, TK's assessment of TCA was an overestimation. For J Refract Surg., a list of sentences is the desired JSON output. Pages 171-179 of Volume 39, Issue 3, from the year 2023, within a specific publication.
To pinpoint the most suitable corneal areas for the derivation of corneal topographic astigmatism (CorT) in keratoconic eyes.
A retrospective study of corneal tomographer data (raw total corneal power from 179 eyes in 124 patients) enabled the calculation of potential corneal astigmatism measures. The measures, derived from annular corneal regions showing variations in both their range and the position of their centers, are evaluated according to the cohort's ocular residual astigmatism (ORA) variability.