Implante de segmentos de anel estromal em ceratocone: resultados e correlações com a biomecânica corneana pré-operatória

Ambrósio, Renato; Borges, José Salgado; Costa-Ferreira, Cláudia; Coelho, V. S.; Silva, Renata Siqueira da; Valbon, Bruno de Freitas; Siqueira, Jorge Augusto; Velarde, Guillermo Coca

doi:10.1590/s0034-72802012000200004

Cited by 2 publications

(1 citation statement)

References 59 publications

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“… 80 , 84 , 85 Nevertheless, as a new corneal shape is created, the final functional result is not completely predictable. 80 The idea of better functional results in softer corneas was reported years ago with the ORA 86 , 87 but a recent study highlighted the low predictive value of corneal biomechanics in comparison with other presurgical characteristics. 88 …”

Section: Corneal Biomechanics and Intracorneal Ring Segmentsmentioning

confidence: 99%

Corneal Biomechanical Assessment with Ultra-High-Speed Scheimpflug Imaging During Non-Contact Tonometry: A Prospective Review

Baptista¹,

Ambrósio²,

Oliveira³

et al. 2021

OPTH

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Background In recent years, increasing interest has arisen in the application of data from corneal biomechanics in many areas of ophthalmology, particularly to assist in the detection of early corneal ectasia or ectasia susceptibility, to predict corneal response to surgical or therapeutic interventions and in glaucoma management. Technology has evolved and, recently, the Scheimpflug principle was associated with a non-contact air-puff tonometer, allowing a thorough analysis of corneal biomechanics and a biomechanically corrected intraocular pressure assessment, opening up new perspectives both in ophthalmology and in other medical areas. Data from corneal biomechanics assessment are being integrated in artificial intelligence models in order to increase its value in clinical practice. Objective To review the state of the art in the field of corneal biomechanics assessment with special emphasis to the technology based on ultra-high-speed Scheimpflug imaging during non-contact tonometry. Summary A meticulous literature review was performed until the present day. We used 136 published manuscripts as our references. Both information from healthy individuals and descriptions of possible associations with systemic diseases are described. Additionally, it exposed information regarding several fields of ocular pathology, from cornea and ocular surface through areas of refractive surgery and glaucoma until vascular and structural diseases of the chorioretinal unit.

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Section: Corneal Biomechanics and Intracorneal Ring Segmentsmentioning

confidence: 99%

Corneal Biomechanical Assessment with Ultra-High-Speed Scheimpflug Imaging During Non-Contact Tonometry: A Prospective Review

Baptista¹,

Ambrósio²,

Oliveira³

et al. 2021

OPTH

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Customized Stromal Lenticule Implantation for Keratoconus

Doroodgar¹,

Jabbarvand²,

Niazi³

et al. 2020

J Refract Surg

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PURPOSE: To investigate the potential benefit of keratoconus surgery using customized corneal stromal donor lenticules obtained from myopic small incision lenticule extraction (SMILE) surgery by femtosecond laser. METHODS: In this prospective, consecutive, non-comparative series of cases, 22 lenticules were obtained from 22 myopic patients who had SMILE with a lenticule central thickness of greater than 110 µm. The lenticules were implanted in 22 eyes with advanced keratoconus. The lenticules were customized for the purpose of the implantation with either a simple necklace or necklace-with-ring shape (compound form) depending on the corneal thickness and corneal topography configuration of the implanted keratoconic eyes. The lenticules were implanted into a 9.5-mm corneal lamellar pocket created by the femtosecond laser. Changes in densitometry, thickness, confocal microscopy, corrected distance visual acuity (CDVA), and endothelial cell density were investigated. RESULTS: Intrastromal lenticule implantation was successfully performed in all cases without any complication. Corneal thickness showed a mean enhancement of 100.4 µm at the thinnest point. On biomicroscopy, all corneas were clear at 1 year postoperatively and there was a significant improvement in corneal densitometry during the entire follow-up period. Confocal biomicroscopy showed collagen reactivation without any inflammatory features caused by the implanted fresh lenticules. CDVA improved from 0.70 to 0.49 logMAR ( P = .001) and keratometry decreased from 54.68 ± 2.77 to 51.95 ± 2.21 diopters ( P = .006). CONCLUSIONS: Customized SMILE lenticule implantation by femtosecond laser proved to be feasible, resulting in an improvement in vision, topography, and refraction in the implanted eyes. [ J Refract Surg . 2020;36(12):786–794.]

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Implante de segmentos de anel estromal em ceratocone: resultados e correlações com a biomecânica corneana pré-operatória

Cited by 2 publications

References 59 publications

Corneal Biomechanical Assessment with Ultra-High-Speed Scheimpflug Imaging During Non-Contact Tonometry: A Prospective Review

Corneal Biomechanical Assessment with Ultra-High-Speed Scheimpflug Imaging During Non-Contact Tonometry: A Prospective Review

Customized Stromal Lenticule Implantation for Keratoconus

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