Conductive keratoplasty: a radiofrequency-based technique for the correction of hyperopia

McDonald, Marguerite B.

doi:10.1016/j.ajo.2006.06.027

Cited by 18 publications

(20 citation statements)

References 64 publications

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“…Actually, as discussed by McDonald 2005: "[…] in the Slit-Lamp photograph of cornea, at 1 h after CK treatment, are visible as small surface of leukomas, with the lines of tension or striae connecting the treatment of spot. These lines of tension are responsible for the tightening of the peripheral cornea and the subsequent steepening of the central cornea".…”

Section: Discussion Of the Analysis Outcomesmentioning

confidence: 96%

Section: The Conductive Keratoplastymentioning

confidence: 99%

“…The instrument tip pierces into about 80% of the corneal depth (McDonald 2005;Hersh 2005) and produces a rather homogenous and uniform cylinder of scar tissue. More precisely, the analysis of the histology of a pig eye one week after CK treatment shows at each treatment spot a cylindrical footprint that extends to approximately 80% of the depth of midperipheral cornea (McDonald 2005). The treatment spots in the histopathological images of human corneae appear somewhat more homogenous and deeper (approximately 500 µm) than the cylindrical thermal footprint (Naoumidi et al 2005), but it can be nevertheless related to this shape.…”

Section: The Conductive Keratoplastymentioning

confidence: 99%

“…A cinching effect is thus obtained that increases the curvature of the central cornea, yielding the desired result. Although the procedure is far less invasive and risky than ablative ones, the post-operative follow-up shows that the initial degree of refractive correction tends to decrease 20% in 24 months' time (McDonald 2005;Esquenazi et al 2006) so that the predictability of the outcome cannot be considered completely satisfactory.…”

Section: Introductionmentioning

confidence: 96%

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The role of viscoelasticity and stress gradients on the outcome of conductive keratoplasty

Fraldi

Cutolo

Esposito

et al. 2010

Biomech Model Mechanobiol

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A mechanical analysis of the conductive keratoplasty on hyperopic eyes has been carried out, and the attention has been focused on incorporating the actual viscoelastic properties of the human corneal tissue and on the stress gradients induced by the intervention. By avoiding unnecessary complications which may obscure the essential behaviour of the model, the results are in very good agreement with the clinical and experimental findings and suggest that the major role in the commonly observed decrease of the initial degree of the refractive correction might be played by the stress gradients at the intervention spots, which are likely to influence the wound-healing. The study aims to contribute some firm mechanical roots to the predictability of the outcome of an increasingly popular technique that, notwithstanding several advantages with respect to ablative interventions, at present cannot be considered completely satisfactory.

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Section: Discussion Of the Analysis Outcomesmentioning

confidence: 96%

Section: The Conductive Keratoplastymentioning

confidence: 99%

Section: The Conductive Keratoplastymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

See 2 more Smart Citations

The role of viscoelasticity and stress gradients on the outcome of conductive keratoplasty

Fraldi

Cutolo

Esposito

et al. 2010

Biomech Model Mechanobiol

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“…Thermal alteration of corneal collagen occurs when the tissue is exposed to temperatures of 58°to 75°C. In detail, the collagen matrix changes from the triple helix formation to a partially coiled structure resulting in shrinkage of collagen fibers [10][11][12][13][14]. Opti-K, with the use of sapphire applanation ring, confines thermal elevation into the anterior corneal stroma, which produces limited thermally damaged zones that compact the anterior stromal lamellae while preserving the overlying epithelium.…”

Section: Discussionmentioning

confidence: 99%

Optimal keratoplasty for the correction of presbyopia and hypermetropia

Lanzetta¹

2017

http://isrctn.com/

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Purpose. To evaluate prospectively the safety and efficacy of optimal keratoplasty for the correction of hyperopia and presbyopia. Methods. Consecutive patients undergoing bilateral optimal keratoplasty for refractive presbyopic and hypermetropic corrections were enrolled. Each patient received a complete ophthalmologic examination at baseline, 1 hour, 1 day, 1 week, 1 month, 3 months, and 6 months after treatment. Results. The study included 40 consecutive eyes of 20 patients. All patients reached the 6-month follow-up. No serious intra-or postoperative complications were recorded. Monocular and binocular uncorrected near visual acuities improved significantly during the follow-up (p < 0 001). Binocular uncorrected distance visual acuity in presbyopic patients improved from 0.28 logMAR to a maximum of 0.04 logMAR (from 20/38 to 20/22 Snellen equivalent) the day after the treatment and remained significantly better than baseline until the end of the follow-up. A significant improvement of patient satisfaction for near (p < 0 001) and distance (p = 0 007) activities was seen the day after treatment and was maintained throughout the follow-up. Conclusions. Optimal keratoplasty is a safe, noninvasive, rapid, pain-free, office-based procedure. It offers low to moderate hyperopes and presbyopes an improvement in uncorrected near visual acuity while maintaining or improving their distance visual acuity.

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Combined astigmatic keratotomy and conductive keratoplasty to correct high corneal astigmatism

Kovoor

Tannan

et al. 2015

Journal of Cataract and Refractive Surgery

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Conductive keratoplasty: a radiofrequency-based technique for the correction of hyperopia

Cited by 18 publications

References 64 publications

The role of viscoelasticity and stress gradients on the outcome of conductive keratoplasty

The role of viscoelasticity and stress gradients on the outcome of conductive keratoplasty

Optimal keratoplasty for the correction of presbyopia and hypermetropia

Combined astigmatic keratotomy and conductive keratoplasty to correct high corneal astigmatism

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