Evaluation of axis alignment and refractive results of toric phakic IOL using image-guided system

Emerah, Sherif H

doi:10.18240/ijo.2020.04.21

“…24,25 Hyun et al found misalignment values around 3 to 4 degrees, whereas other authors, with results similar to ours (AoE = 0.26 degrees), found mean values around 2 degrees. 19,26,27 In addition, these small misalignments, which are more sensitive in high astigmatism, are better tolerated in low astigmatism. 28…”

Section: Discussionmentioning

confidence: 99%

“…24,25 Hyun et al found misalignment values around 3 to 4 degrees, whereas other authors, with results similar to ours (AoE = 0.26 degrees), found mean values around 2 degrees. 19,26,27 In addition, these small misalignments, which are more sensitive in high astigmatism, are better tolerated in low astigmatism. 28 Regarding spherical ICL correction associated with astigmatic incisions, in the only case report published to date, by Zhen Li et al, using limbal relaxing incisions showed a reduction in astigmatism from 1.48 ± 0.35 D preoperatively to 0.37 ± 0.14 D 1 month postoperatively with a UDVA greater than that in the control group (spherical ICL) (P < .05).…”

Section: Discussionmentioning

confidence: 99%

Management of low astigmatism in implantable collamer lens surgery: opposite clear corneal incisions vs toric implantable collamer lens

González-Cruces,

Sánchez-Ventosa,

Villarrubia

et al. 2023

J Cataract Refract Surg

0

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Purpose: To compare two techniques to correct low astigmatism during implantable collamer lens (ICL) surgery: astigmatic opposite clear corneal incisions (OCCIs) and toric ICL (T-ICL). Setting: Arruzafa Ophthalmological Hospital, Cordoba, Spain. Design: Randomized prospective comparative study. Methods: The study comprised 152 myopic eyes undergoing ICL (STAAR Surgical) surgery. Patients were separated into two groups: group 1 (57 patients; 76 eyes) received a spherical ICL with OCCIs and group 2 (53 patients; 76 eyes) received a T-ICL. The inclusion criteria were refractive astigmatism up to 1.50 diopters (D), regular corneal astigmatism up to 2.00 D (Sim K, Pentacam), and agreement between the refractive and topographic corneal cylinders (discrepancies less than 30º axis or 0.50 D). The outcomes were evaluated after a one-month follow-up. Results: The T-ICL group achieved a mean postoperative spherical equivalent refraction and refractive astigmatism of -0.04 ± 0.17 D and -0.03 ± 0.12 D, respectively, versus -0.14 ± 0.33 D and -0.20 ± 0.36 D, in the OCCI group (P<0.001). Postoperative refractive astigmatism of less than 0.25 D was achieved in 94.74% of cases in the T-ICL group versus 73.68% in the OCCI group. Undercorrection of corneal astigmatism occurred in the OCCI group with a surgically induced astigmatism of 0.48 ± 0.24 D and correction index=0.46. Conclusions: Both the T-ICL and OCCI techniques provided excellent results in terms of safety and efficacy. T-ICL surgery was shown to be more predictable and accurate for correcting low astigmatism with a lower postoperative spherical equivalent and less residual astigmatism compared to incisional management.

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“…328,[628][629][630][631] An effort should be made to determine the true corneal refractive power, which incorporates both the anterior and posterior corneal power, either by direct assessment or by algorithmic adjustment. 620,[632][633][634][635][636][637][638] Use of presbyopia-correcting IOLs or monovision may improve quality of life by reducing eyeglass or contact lens dependence after cataract surgery. 639 For each of these options, patient selection is critical.…”

Section: P28mentioning

confidence: 99%