Perioperative pupil size in low-energy femtosecond laser-assisted cataract surgery.

<h4>Purpose</h4>To assess potential changes in pupil size during femtosecond laser-assisted cataract surgery (FLACS) using a low-energy laser system.<h4>Methods</h4>The pupil sizes of eyes undergoing FLACS were measured using the Ziemer LDV Z8 by extracting images from the la...

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Autores principales:	Alireza Mirshahi, Astrid Schneider, Catharina Latz, Katharina A Ponto
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/398f1de2ea6646ee94c253b5174fb2d6
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spelling	oai:doaj.org-article:398f1de2ea6646ee94c253b5174fb2d62021-11-25T05:54:15ZPerioperative pupil size in low-energy femtosecond laser-assisted cataract surgery.1932-620310.1371/journal.pone.0251549https://doaj.org/article/398f1de2ea6646ee94c253b5174fb2d62021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0251549https://doaj.org/toc/1932-6203<h4>Purpose</h4>To assess potential changes in pupil size during femtosecond laser-assisted cataract surgery (FLACS) using a low-energy laser system.<h4>Methods</h4>The pupil sizes of eyes undergoing FLACS were measured using the Ziemer LDV Z8 by extracting images from the laser software after each of the following steps: application of suction, lens fragmentation, and capsulotomy. Furthermore, the pupil diameters were measured based on preoperative surgical microscope images and after releasing the suction. Paired t-test and the two one-sided tests (TOST) procedure were used for statistical analyses. The horizontal and vertical pupil diameters were compared in each of the steps with preoperative values.<h4>Results</h4>Data were available for 52 eyes (52 patients, mean age 73.4 years, range 51-87 years). The equivalence between mean preoperative pupil size and status immediately after femtosecond laser treatment was confirmed (p<0.001; 95% confidence interval [-0.0637, 0.0287] for horizontal and p<0.001; 95% CI [-0.0158, 0.0859] for vertical diameter). There was statistically significant horizontal and vertical enlargement of pupil diameters between 0.15 and 0.24 mm during the laser treatment steps as compared with preoperative values (all p values <0.001).<h4>Conclusions</h4>No progressive pupil narrowing was observed using low-energy FLACS. Although a suction-induced, slight increase in pupil area became apparent, this effect was completely reversible after removing the laser interface.Alireza MirshahiAstrid SchneiderCatharina LatzKatharina A PontoPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 5, p e0251549 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Alireza Mirshahi Astrid Schneider Catharina Latz Katharina A Ponto Perioperative pupil size in low-energy femtosecond laser-assisted cataract surgery.
description	<h4>Purpose</h4>To assess potential changes in pupil size during femtosecond laser-assisted cataract surgery (FLACS) using a low-energy laser system.<h4>Methods</h4>The pupil sizes of eyes undergoing FLACS were measured using the Ziemer LDV Z8 by extracting images from the laser software after each of the following steps: application of suction, lens fragmentation, and capsulotomy. Furthermore, the pupil diameters were measured based on preoperative surgical microscope images and after releasing the suction. Paired t-test and the two one-sided tests (TOST) procedure were used for statistical analyses. The horizontal and vertical pupil diameters were compared in each of the steps with preoperative values.<h4>Results</h4>Data were available for 52 eyes (52 patients, mean age 73.4 years, range 51-87 years). The equivalence between mean preoperative pupil size and status immediately after femtosecond laser treatment was confirmed (p<0.001; 95% confidence interval [-0.0637, 0.0287] for horizontal and p<0.001; 95% CI [-0.0158, 0.0859] for vertical diameter). There was statistically significant horizontal and vertical enlargement of pupil diameters between 0.15 and 0.24 mm during the laser treatment steps as compared with preoperative values (all p values <0.001).<h4>Conclusions</h4>No progressive pupil narrowing was observed using low-energy FLACS. Although a suction-induced, slight increase in pupil area became apparent, this effect was completely reversible after removing the laser interface.
format	article
author	Alireza Mirshahi Astrid Schneider Catharina Latz Katharina A Ponto
author_facet	Alireza Mirshahi Astrid Schneider Catharina Latz Katharina A Ponto
author_sort	Alireza Mirshahi
title	Perioperative pupil size in low-energy femtosecond laser-assisted cataract surgery.
title_short	Perioperative pupil size in low-energy femtosecond laser-assisted cataract surgery.
title_full	Perioperative pupil size in low-energy femtosecond laser-assisted cataract surgery.
title_fullStr	Perioperative pupil size in low-energy femtosecond laser-assisted cataract surgery.
title_full_unstemmed	Perioperative pupil size in low-energy femtosecond laser-assisted cataract surgery.
title_sort	perioperative pupil size in low-energy femtosecond laser-assisted cataract surgery.
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/398f1de2ea6646ee94c253b5174fb2d6
work_keys_str_mv	AT alirezamirshahi perioperativepupilsizeinlowenergyfemtosecondlaserassistedcataractsurgery AT astridschneider perioperativepupilsizeinlowenergyfemtosecondlaserassistedcataractsurgery AT catharinalatz perioperativepupilsizeinlowenergyfemtosecondlaserassistedcataractsurgery AT katharinaaponto perioperativepupilsizeinlowenergyfemtosecondlaserassistedcataractsurgery
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Perioperative pupil size in low-energy femtosecond laser-assisted cataract surgery.

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