Corneal Sensitivity after Refractive Surgery

Kohlhaas, M.; Klemm, M.; Böhm, Andreas; Drager, J.; Lombardi, Marco; Abbondanza, Marco

doi:10.1016/s0955-3681(13)80204-3

Cited by 14 publications

(11 citation statements)

References 5 publications

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“…Recovery is generally faster after low myopic correction, 11,12 and it is postulated that the slower recovery after high myopic correction could be due to the formation of corneal haze and also the greater nerve destruction from the deeper ablation. 13 In LASIK, nerve fiber damage occurs from 2 causes. First, a microkeratome is used to cut a superficial corneal stromal flap and severs superficial nerve fibers in the area of the flap.…”

Section: Discussionmentioning

confidence: 99%

“…Other reports indicate that clinical recovery of CCS after LASIK may take 6 to 12 months. [11][12][13] Laser-assisted subepithelial keratectomy, a modication of PRK, combines the advantages of PRK and LASIK. Experimental studies have shown that treatment with alcohol 20% for 30 seconds preserves the viability of most of the treated corneal epithelium.…”

Section: Discussionmentioning

confidence: 99%

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Recovery of corneal sensitivity after laser-assisted subepithelial keratectomy

Wu¹,

Chu²,

Zhou³

et al. 2006

Journal of Cataract and Refractive Surgery

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Recovery of corneal sensitivity after laser-assisted subepithelial keratectomy

Wu¹,

Chu²,

Zhou³

et al. 2006

Journal of Cataract and Refractive Surgery

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“…Studies of corneal sensitivity after radial keratotomy (RK)3-4have produced equivocal results. Shivitz and coworkers4found increased touch thresholds for up to 1 year after RK but, in contrast, a recent study3 reported that corneal sensitivity was unaffected by radial corneal incisions.…”

mentioning

confidence: 88%

“…Corneal touch thresholds within the donor lenticle are increased as long as 3 years after the procedure 3. Surprisingly there is also a mild loss of peripheral corneal sensitivity during the first postoperative year, presumably due to retrograde neural degeneration 3. Studies of corneal sensitivity after radial keratotomy (RK)3-4have produced equivocal results.…”

mentioning

confidence: 99%

“…Recent studies5 6 have suggested that the extent and duration of corneal hypoaesthesia is dependent on ablation depth. Following deep (>30 μm) ablation both central and peripheral (unablated) corneal sensitivity were reduced compared with a group receiving shallow ablations (<30 μm) Kohlaas et al 3reported that a small group of patients with severe subepithelial haze appeared to have a delayed recovery of sensitivity.…”

mentioning

confidence: 99%

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Effect of beam variables on corneal sensitivity after excimer laser photorefractive keratectomy

Lawrenson

Corbett

O’Brart

et al. 1997

British Journal of Ophthalmology

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Aim-To investigate changes in corneal touch sensitivity following excimer laser photorefractive keratectomy (PRK) using diVerent beam configurations. Methods-20 subjects were given a unilateral −3.00 D correction with either a 5 mm (26 µm, n=10) or 6 mm (42 µm, n=10) beam diameter. Thirty subjects underwent a unilateral −6.00 D correction with 5 mm (62 µm, n=10), 6 mm (78 µm, n=10), or multizone (62 µm, n=10) treatments. The multizone treatment was 6 mm in diameter with the depth of the 5 mm treatment. Corneal sensitivity was measured using a slit-lamp mounted Cochet-Bonnet aesthesiometer before and at 1, 3, 6, and 12 months after PRK. Stimulus locations included points lying within the ablated zone (central) and outside (peripheral). These were compared with the equivalent locations in control (untreated) eyes. Results-There was a significant reduction in corneal sensitivity within the central (ablated) zone in all treatment groups after PRK. In most groups a return to full sensitivity was achieved by 6 months with the exception of the multizone treatment group which showed significant corneal hypoaesthesia at 12 months. Peripheral corneal sensitivity was also reduced in this group up to 3 months after the procedure. A comparison between the −3.00 D and −6.00 D treatment groups showed no significant diVerence. However, combining data from all treatment groups, a significant correlation was found between the interocular diVerence in central corneal sensitivity and postoperative haze at 3 and 6 months. Conclusions-For corrections up to −6.00 D ablation depth and treatment zone diameter do not appear to be clinically important determinants of corneal hypoaesthesia. In contrast, postoperative corneal haze appears to correlate with sensitivity loss. (Br J Ophthalmol 1997;81:686-690)

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Corneal sensitivity in health and disease

Lawrenson

1997

Ophthalmic and Physiological Optics

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Corneal Sensitivity after Refractive Surgery

Cited by 14 publications

References 5 publications

Recovery of corneal sensitivity after laser-assisted subepithelial keratectomy

Recovery of corneal sensitivity after laser-assisted subepithelial keratectomy

Effect of beam variables on corneal sensitivity after excimer laser photorefractive keratectomy

Corneal sensitivity in health and disease

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