Nonfreeze Epikeratophakia for the Correction of Myopia

Krumeich, J. H.; Swinger, Casimir A.

doi:10.1016/s0002-9394(14)77763-3

Cited by 45 publications

(4 citation statements)

References 8 publications

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“…10,11 This BKS non-freeze technique involved placing the ressected disc epithelial side down onto a curved suction die or mold where a second pass of the microkeratome removed tissue from the exposed posterior stromal surface according to the shape of the die (Fig 6). 10,11 This BKS non-freeze technique involved placing the ressected disc epithelial side down onto a curved suction die or mold where a second pass of the microkeratome removed tissue from the exposed posterior stromal surface according to the shape of the die (Fig 6).…”

Section: Barraquer-krumeich-swinger Techniquementioning

confidence: 99%

The History of LASIK

Reinstein¹,

Archer²,

Gobbé³

2012

J Refract Surg

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Keratomileusis, brainchild of Jose I. Barraquer Moner, was conceived and developed as the first stromal sculpting method to correct refractive error in 1948. The word "keratomileusis" literally means "sculpting" of the "cornea." Barraquer's first procedures involved freezing a disc of anterior corneal tissue before removing stromal tissue with a lathe. Over the years, the procedure continued to develop, first through the Barraquer-Krumeich-Swinger non-freeze technique where tissue was removed from the underside of the disc by a second pass of the microkeratome. In-situ keratomileusis was later developed by passing the microkeratome a second time directly on the stromal bed. The procedure became known as automated lamellar keratoplasty with the invention of an automated microkeratome and was further refined by replacing the disc without sutures and later by stopping the microkeratome before the end of the pass to create a hinged flap, as first demonstrated in 1989. The history of the excimer laser dates back to 1900 and the quantum theory, eventually leading to the discovery that 193-nm ultraviolet excimer laser pulses could photoablate tissue without thermal damage. Ultrastructural and wound healing studies confirmed that large area ablation could be performed in the central cornea. This was described as photorefractive keratectomy in 1986 and the first sighted eyes were treated in 1988. An excimer laser was first used to sculpt from the stromal bed under a hinged flap created manually using a trephine and scalpel in 1988. The incorporation of a microkeratome in 1990 finally led to laser in situ keratomileusis-LASIK-as we know it today.

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Section: Barraquer-krumeich-swinger Techniquementioning

confidence: 99%

The History of LASIK

Reinstein¹,

Archer²,

Gobbé³

2012

J Refract Surg

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“…8,9 Today, epikeratophakia is rarely used (Ͻ1%). 6,[10][11][12] Excimer ablative procedures can be used alone to reduce astigmatism 13 or combined with collagen cross-linking to slow progression of keratoconus and postoperative LASIK ectasia. 14 Collagen cross-linking is also used alone.…”

mentioning

confidence: 99%

Circular Keratotomy to Reduce Astigmatism and Improve Vision in Stage I and II Keratoconus

Krumeich¹,

Kezirian²

2009

J Refract Surg

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Circular keratotomy provides significant reduction in astigmatism, improved BSCVA, and stabilization of astigmatic changes in most eyes, although some eyes show limited benefit. Eyes with higher preoperative astigmatism appear to be more likely to benefit from the procedure than those with lower preoperative astigmatism. Circular keratotomy also resulted in reasonable clinical results for the treatment of stage I and II keratoconus.

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“…The desired effect upon the central corneal curvature and astigmatism is obtained by suturing the graft tightly into a circular groove or interlamellar cleft in the recipient cornea with a greater outer diameter than the diameter of the graft. Previously, these corneal grafts have always been machine-made, usually consisting of lathed, lyophilized tissue (McDonald et al 1986), although the production of corneal lenses from unfrozen tissue has also been described (Krumeich & Swinger 1987).…”

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confidence: 99%

Epikeratophakia for keratoconus Long‐term results using fresh, free‐hand made lamellar grafts

Høvding

Bertelsen

1992

Acta Ophthalmologica

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Epikeratophakia using fresh, free-hand made corneal grafts was done in 16 patients with keratoconus. The follow-up period averaged 27.8 months (range 13-45 months). A significant improvement of visual acuity was obtained (p = 0.002), and 14 of the 16 eyes (87.5%) achieved a corrected visual acuity greater than or equal to 6/12. The spherical equivalent and the cylindrical refractive error were reduced (p less than 0.05), and a significant flattening of the central corneal curvature was obtained (p less than 0.002). The mean postoperative central corneal astigmatism was 4.25 D. Postoperatively, the mean central corneal thickness was 0.670 mm, and the mean central thickness of the epithelialized graft was 0.336 mm. Six patients reported some postoperative glare or blurring of vision, despite a visual acuity greater than or equal to 6/9 on the Snellen chart. No significant subjective or objective changes were noticed after the 6-month postoperative follow-up visit.

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Nonfreeze Epikeratophakia for the Correction of Myopia

Cited by 45 publications

References 8 publications

The History of LASIK

The History of LASIK

Circular Keratotomy to Reduce Astigmatism and Improve Vision in Stage I and II Keratoconus

Epikeratophakia for keratoconus Long‐term results using fresh, free‐hand made lamellar grafts

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