Ten-year follow-up of photorefractive keratectomy for myopia

Koshimizu, Junko; Dhanuka, Raksha; Yamaguchi, Tatsuo

doi:10.1007/s00417-010-1312-2

Cited by 31 publications

(20 citation statements)

References 37 publications

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“…Our visual acuity and safety results are similar to those in these studies, with only 1 late-phase complication in a patient who developed a retinal detachment that was probably unrelated to the PRK. This is similar to the levels of safety reported after 10 years by Koshimizu et al 10 Our study evaluated 39 eyes of the 58 eyes that O'Conner et al 3 examined 4 years previously. We had similar outcomes, with a mean refractive error of À0.58 D and À0.54 D in the 16-year group and 12-year group, respectively; 79.5% of eyes in the 16-year group and 81% in the 12-year group were within G1.00 D of emmetropia.…”

Section: Discussionsupporting

confidence: 55%

Excimer laser photorefractive keratectomy for low to moderate myopia using a 5.0 mm treatment zone and no transitional zone: 16-year follow-up

Guérin¹,

Darcy²,

O’Connor³

et al. 2012

Journal of Cataract and Refractive Surgery

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Section: Discussionsupporting

confidence: 55%

Excimer laser photorefractive keratectomy for low to moderate myopia using a 5.0 mm treatment zone and no transitional zone: 16-year follow-up

Guérin¹,

Darcy²,

O’Connor³

et al. 2012

Journal of Cataract and Refractive Surgery

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“…Our results seem comparable with other long-term prospective and retrospective results 8 to 16 years after PRK. [11][12][13][14][20][21][22][23] Concerning refractive predictability and stability, Alio et al 20,21 reported 75% of eyes (with less than -6 D) and 58% of eyes (with more than -6 D) being within ±1.0 D 10 years after PRK. Bricola et al 12 reported no late regression after 14 years, and Guerin et al 11 found a mean SE error of -0.69 ± 0.79 in 23 patients after 16 years.…”

Section: Discussionmentioning

confidence: 99%

“…Our result of 12% of all eyes ending up with haze was comparable to other studies, 10 to 16 years after PRK. 11,12,22 Preoperative information is always important to balance patient expectations. Because this was a relatively new type of surgery at the time, all patients were told the known risks, that there was no guarantee of spectacle independence, and that long-term outcomes were unknown.…”

Section: Discussionmentioning

confidence: 99%

Long-term Outcomes of Photorefractive Keratectomy for Low to High Myopia: 13 to 19 Years of Follow-Up

Vestergaard

Hjortdal²,

Ivarsen³

et al. 2013

J Refract Surg

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“…This included a higher risk of both under and over correction in highly myopic eyes, as previously described (Koshimizu et al. ). Predictability was lower at final follow‐up than after 6 months, indicating refractive instability.…”

Section: Discussionmentioning

confidence: 99%

Past and present of corneal refractive surgery

Vestergaard

2014

Acta Ophthalmologica

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Surgical correction of refractive errors is becoming increasingly popular. In the 1990s, the excimer laser revolutionized the field of corneal refractive surgery with PRK and LASIK, and lately refractive lenticule extraction (ReLEx) of intracorneal tissue, using only a femtosecond laser, has become possible. Two new procedures were developed, ReLEx flex (FLEX) and ReLEx smile (SMILE). Until this thesis, only a few long‐term studies of PRK with a relatively limited number of patients had been published; therefore, this thesis intended to retrospectively evaluate long‐term outcomes after PRK for all degrees of myopia for a large number of patients. Furthermore, a prospective contralateral eye study comparing FLEX and SMILE, when treating high to moderate degrees of myopia, had not been performed prior to this study. This was the second aim of this thesis. In the first study, results from 160 PRK patients (289 eyes) were presented. Preoperative spherical equivalent ranged from −1.25 to −20.25 D, with 78% having low myopia (<−6 D). Average follow‐up time was 16 years (range 13–19 years), making this the longest published follow‐up study on PRK patients. Outcomes from eyes with low myopia were generally superior to outcomes from eyes with high myopia, at final follow‐up. Seventy‐two percent were within ±1.00 D of target refraction, as compared to 47% of eyes with high myopia. However, results from a subgroup of unilateral treated PRK patients indicated that refraction at final follow‐up was affected by myopic progression. Fifty percent of eyes with low myopia had uncorrected 20/20 distance visual acuity or better, as compared to 22% of eyes with high myopia. Haze did not occur if attempted corrections were <−4 D, and only eyes with high myopia lost two lines or more of CDVA (corrected distance visual acuity). Eighty‐one per cent were satisfied or very satisfied with their surgery. Conclusion: The results support the continued use of the excimer laser for corneal surface ablation as a treatment option for correction of low degrees of myopia, and as the treatment of choice for subgroups of refractive patients (thin corneas, etc.). The results also highlight that treatment of higher degrees of myopia with standard PRK should only be done today under special circumstances, due to low refractive predictability, and high risk of corneal haze. Technological advances since then should be taken into account when comparing these results with contemporary techniques. In the second study, 35 patients were randomized to receive FLEX in one eye and SMILE in the other. Preoperative spherical equivalent refraction ranged from −6 to −10 D with low degrees of astigmatism. A total of 34 patients completed the 6 month follow‐up period. Refractive and visual outcomes were very similar for the two methods, as well as tear film measurements and changes in corneal biomechanics. Ninety‐seven percent were within ±1.00 D of target refraction, no eyes lost two lines or more of CDVA, and contrast sensitivity was unaffected after both pro...

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Ten-year follow-up of photorefractive keratectomy for myopia

Abstract: PRK is safe and effective in refraction even 10 years after surgery; however, further long-term follow-up is needed to evaluate the decreasing of endothelial cells.

Cited by 31 publications

References 37 publications

Excimer laser photorefractive keratectomy for low to moderate myopia using a 5.0 mm treatment zone and no transitional zone: 16-year follow-up

Excimer laser photorefractive keratectomy for low to moderate myopia using a 5.0 mm treatment zone and no transitional zone: 16-year follow-up

Long-term Outcomes of Photorefractive Keratectomy for Low to High Myopia: 13 to 19 Years of Follow-Up

Past and present of corneal refractive surgery

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