Customized photorefractive keratectomy to correct high ametropia after penetrating keratoplasty: A pilot study

Rosa, Giuseppe De; Boccia, Rosa; Santamaria, Carmine; Fabbozzi, Lorenzo; Rosa, Luigi De; Lanza, Michele

doi:10.1016/j.optom.2013.12.002

Cited by 16 publications

(30 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These excellent refractive outcomes are also corroborated by the other small published series including eyes with previous CT, 4,13,14,26,27 all consistently describing significant postoperative improvements of ametropias. Satisfactory results were also reported by Alió et al, 28,29 in 2 large prospective case series of highly aberrated corneas after refractive surgery treated with excimer ablations based on corneal wavefront topography.…”

Section: Discussionsupporting

confidence: 73%

Irregular Astigmatism After Corneal Transplantation—Efficacy and Safety of Topography-Guided Treatment

Rosa

Guerra

Tavares

et al. 2016

Cornea

View full text Add to dashboard Cite

show abstract

Section: Discussionsupporting

confidence: 73%

Irregular Astigmatism After Corneal Transplantation—Efficacy and Safety of Topography-Guided Treatment

Rosa

Guerra

Tavares

et al. 2016

Cornea

View full text Add to dashboard Cite

show abstract

“…Compared to other techniques, undercorrection and, rarely, overcorrection have also been reported for almost all corneal refractive surgical methods of correcting post-PKP myopia and astigmatism including incisional surgeries [ 12 ], photoablation (PRK or LASIK) [ 19 – 26 ], and ICR implantation [ 17 , 18 ].…”

Section: Discussionmentioning

confidence: 99%

“…Excimer laser photorefractive keratectomy (PRK) has also been proposed but was proven less predictable than when performed in previously nonoperated eyes. Limited astigmatic correction, irregular astigmatism induction, significant regression, corneal haze, and photoablation induced graft rejection are other important disadvantages of such a technique [ 19 , 20 ]. The use of Laser in situ Keratomileusis (LASIK) reduced haze and allowed for more refractive correction but showed an increased risk of flap complications compared to normal eyes.…”

Section: Introductionmentioning

confidence: 99%

Small Incision Lenticule Extraction for Postkeratoplasty Myopia and Astigmatism

Massoud

Ibrahim

Shehata³

et al. 2016

Journal of Ophthalmology

View full text Add to dashboard Cite

Purpose. To evaluate the visual and refractive outcomes after small incision lenticule extraction (SMILE) for treating myopia and myopic astigmatism after penetrating keratoplasty (PKP). Design. Case-series. Methods. Ten eyes of 10 patients with previous PKP and residual myopic astigmatism for whom pentacam imaging and thickness measurements were acceptable for laser vision correction. Manifest refraction (MR), uncorrected distance visual acuity (UDVA), and corrected distance visual acuity (CDVA) were obtained preoperatively and one day, one week, and one, 3, and 6 months postoperatively. Cases were operated on the VisuMax® femtosecond laser platform with 500 kHz repetition rate. Results. The mean correction ratio for spherical errors was 0.84 ± 0.19 D and for the mean refractive spherical equivalent (MRSE) was 0.79 ± 0.13 D. Vector analysis showed a mean astigmatism reduction at the intended axis of 67 ± 25.25%, a correction index of 0.81 ± 0.21, and an overall mean percentage of success of astigmatism surgery of 53 ± 37.9%. The postoperative MRSE was stable throughout the 6-month follow-up period. The efficacy index was 0.93 and the safety index was 1.12. Conclusion. SMILE for correction of post-PKP myopia and astigmatism is effective, safe, and stable with moderate accuracy and predictability. Centration of the treatment within the grafts was easily performed.

show abstract

“…However, recent studies are in favor of customized ablation in cases with high amounts of astigmatism. [ 12 13 14 ]…”

Section: Discussionmentioning

confidence: 99%

Efficacy of wavefront-guided photorefractive keratectomy with iris registration for management of moderate to high astigmatism by advanced personalized treatment nomogram

Mohammadpour

Hashemi

Jabbarvand

et al. 2016

J Ophthalmic Vis Res

View full text Add to dashboard Cite

Purpose:To evaluate the efficacy of photorefractive keratectomy (PRK) using the advanced personalized treatment (APT) nomogram for correction of moderate to high astigmatism.Methods:This prospective interventional case series included 60 consecutive eyes of 30 patients undergoing wavefront-guided PRK (Zyoptix 217 Z100 excimer laser, Bausch & Lomb, Munich, Germany) using the APT nomogram and iris registration for myopic astigmatism. Mitomycin-C was applied intraoperatively in all eyes. Ophthalmic examination was performed preoperatively and 1, 3 and 6 months postoperatively.Results:Preoperatively, mean sphere was -1.68 ± 2.08 diopters (D), mean refractive astigmatism was -3.04 ± 1.05 D and mean spherical equivalent (SE) was -3.12 ± 1.77 D. Six months postoperatively, mean sphere was + 0.60 ± 0.64 D (P < 0.005), mean cylinder was -0.43 ± 0.46 D (P < 0.005) and mean SE was + 0.28 ± 0.48 D (P < 0.005). Hyperopic overcorrection (≥ +1.0 D) occurred in 3 (5%) eyes. Postoperatively, root mean square (RMS) of higher order aberrations (HOAs) was significantly increased (P = 0.041). RMS of spherical aberration (Z [4, 0]) showed no significant change after surgery (P = 0.972).Conclusion:Considering the acceptable residual refractive error, low rate of hyperopic overcorrection, acceptable uncorrected visual acuity, and low risk of postoperative corneal haze, PRK using the APT nomogram with iris registration and mitomycin-C use is a safe and effective modality for treatment of moderate to high astigmatism.

show abstract

Customized photorefractive keratectomy to correct high ametropia after penetrating keratoplasty: A pilot study

Abstract: Our pilot study suggests that customized PRK can be a safe and effective method for treating ametropia and irregular astigmatisms after PK. Future studies with larger samples and longer follow-ups should be performed to confirm these results.

Cited by 16 publications

References 40 publications

Irregular Astigmatism After Corneal Transplantation—Efficacy and Safety of Topography-Guided Treatment

Irregular Astigmatism After Corneal Transplantation—Efficacy and Safety of Topography-Guided Treatment

Small Incision Lenticule Extraction for Postkeratoplasty Myopia and Astigmatism

Efficacy of wavefront-guided photorefractive keratectomy with iris registration for management of moderate to high astigmatism by advanced personalized treatment nomogram

Contact Info

Product

Resources

About