Influence of preoperative keratometry on refractive results after laser-assisted subepithelial keratectomy to correct myopia

Benito-Llopis, Laura de; Teus, Miguel A.; Sánchez-Pina, José María; Gil-Cazorla, Raquel

doi:10.1016/j.jcrs.2008.01.027

Cited by 6 publications

(5 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Another study of the effect of keratometry on refractive outcome was carried out by de Benito-Llopis et al [ 20 ] in LASEK cases on 1180 eyes and found that there is a weak positive correlation between preoperative keratometry and postoperative SE, mostly in the subgroup with steeper corneas and when the preoperative refractive error was higher. Yet they did not find a tendency toward undercorrection in flatter corneas, as some studies of LASIK have concluded.…”

Section: Discussionmentioning

confidence: 99%

Effect of Flat Cornea on Visual Outcome after LASIK

Mostafa

2015

Journal of Ophthalmology

View full text Add to dashboard Cite

Purpose. To evaluate the effect of preoperative and postoperative keratometry on the refractive outcome after laser in situ keratomileusis (LASIK) for moderate and high myopia. Methods. Records of 812 eyes (420 patients) with myopia ≥−6 D who had LASIK at Sohag Laser Center, Egypt, from January 2010 to November 2013, were retrospectively analyzed. Main outcome measures were postoperative corrected distance visual acuity (CDVA), postoperative spherical equivalence, and postoperative Q factor. Results. LASIK was performed in 812 eyes (mean age 21.8 ± 5.2 years). Patients were grouped according to the degree of preoperative myopia into three groups: Group 1, −6 D to −7.9 D; Group 2, −8 to −9.9 D; and Group 3, −10 to −12 D. The refractive outcome among the different myopia groups was stratified by pre- and postoperative keratometry. A trend toward greater undercorrection was noted in eyes with preoperative keratometry <43.5 D compared with those with steeper keratometry >46 D in all myopia groups. The undercorrection was also noted in postoperative keratometry groups <35 D. Conclusions. Preoperative and postoperative keratometry appeared to influence the refractive outcome especially in high myopic eyes.

show abstract

Section: Discussionmentioning

confidence: 99%

Effect of Flat Cornea on Visual Outcome after LASIK

Mostafa

2015

Journal of Ophthalmology

View full text Add to dashboard Cite

show abstract

“…Even though small-incision lenticule extraction (SMILE) is a safe, efficient, and predictable surgical method for correction of myopia, the predictability of the technique as well as laser in situ keratomileusis (LASIK) and surface ablation is disputed, especially in eyes with high degrees of myopia or hyperopia [1][2][3][4][5][6][7][8][9]. To date, a few studies have evaluated the effect of preoperative keratometry on visual outcomes after LASIK or surface ablation and predictors of SMILE outcomes [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies showed no relationship between preoperative corneal curvature and postoperative predictability after myopic laser-assisted subepithelial keratectomy (LASEK) [ 14 ]; however, when treating preoperative higher myopia in steeper corneas, a weak tendency existed toward overcorrection [ 12 ]. In previous studies evaluating the effect of preoperative keratometry (K) on visual outcomes after LASIK for myopia, eyes with flatter corneas tended to have greater undercorrection than eyes with similar myopia and steeper corneas, and undercorrection and loss of best spectacle-corrected visual acuity following hyperopic LASIK in eyes with steep corneas [ 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of preoperative keratometry on visual outcomes after small-incision lenticule extraction for myopia

2022

View full text Add to dashboard Cite

Purpose To investigate the relationship between preoperative keratometry (K) and postoperative refraction and compare the visual outcomes after small-incision lenticule extraction (SMILE) between preoperative flat and steep corneas. Methods This study involved 814 consecutive eyes of 409 patients who underwent SMILE. A month later, a linear regression analysis of the relationship between preoperative K and the residual spherical equivalent (SE) along with eyes divided by a single standard deviation between flat and steep corneas (< 41.85 D, > 44.57 D, respectively) was conducted. Eyes were distinguished based on the degree of myopia. Results One month after surgery, no significant correlation existed between mean preoperative K and residual SE (P = 0.459). Linear regression analysis showed a weak negative correlation between flat corneas (r2 = 0.042, P = 0.025) rather than steep corneas (P = 0.908). Eyes with preoperative low myopia (< 3.00 D) (r2 = 0.233, P = 0.001) had a weak correlation compared with moderate and high myopia (P = 0.272, P = 0.257, respectively). Twelve months later, the predictability, safety, and efficacy did not vary between preoperative flat and steep corneas (P > 0.05). Conclusions One month after SMILE for myopia, the corneas were flatter in the preoperative flat corneas or all the low myopic corneas, and they were more overcorrected. However, preoperative corneal curvature does not influence visual outcomes at 1 year after SMILE.

show abstract

“…[1][2][3][4][5][6][7][8][9] To date, a few studies have evaluated the effect of preoperative keratometry on visual outcomes after LASIK or surface ablation and predictors of SMILE outcomes. [10][11][12][13] Previous studies showed no relationship between preoperative corneal curvature and postoperative predictability after myopic laser-assisted subepithelial keratectomy (LASEK); [14] however, when treating preoperative higher myopia in steeper corneas, a weak tendency existed toward overcorrection. [12] In previous studies evaluating the effect of preoperative keratometry (K) on visual outcomes after LASIK for myopia, eyes with atter corneas tended to have greater undercorrection than eyes with similar myopia and steeper corneas, and undercorrection and loss of best spectacle-corrected visual acuity following hyperopic LASIK in eyes with steep corneas.…”

Section: Introductionmentioning

confidence: 99%

“…[10][11][12][13] Previous studies showed no relationship between preoperative corneal curvature and postoperative predictability after myopic laser-assisted subepithelial keratectomy (LASEK); [14] however, when treating preoperative higher myopia in steeper corneas, a weak tendency existed toward overcorrection. [12] In previous studies evaluating the effect of preoperative keratometry (K) on visual outcomes after LASIK for myopia, eyes with atter corneas tended to have greater undercorrection than eyes with similar myopia and steeper corneas, and undercorrection and loss of best spectacle-corrected visual acuity following hyperopic LASIK in eyes with steep corneas. [10,11] Besides, moderately myopic eyes with atter corneas preoperatively show better visual prognosis following LASIK compared with steeper corneas.…”

Section: Introductionmentioning

confidence: 99%

Effect of Preoperative Keratometry on Visual Outcomes After Small-incision Lenticule Extraction for Myopia

Lee¹,

Bae²,

Jung

2021

Preprint

View full text Add to dashboard Cite

Purpose: To investigate the relationship between preoperative keratometry (K) and postoperative refraction, and compare the visual outcomes after small-incision lenticule extraction (SMILE) between preoperative flat and steep corneas.Methods: This study involved 814 consecutive eyes of 409 patients who underwent SMILE. A month later, a linear regression analysis of the relationship between preoperative K and the residual spherical equivalent (SE) along with eyes divided by a single standard deviation between flat and steep corneas (< 41.85 D, > 44.57 D, respectively) was conducted. Eyes were distinguished based on the degree of myopia. Results: One month after surgery, no significant correlation existed between mean preoperative K and residual SE (P = 0.459). Linear regression analysis showed a weak negative correlation between flat corneas (r2 = 0.042, P =0.025) rather than steep corneas (P = 0.908). Eyes with preoperative low myopia (< 3.00 D) (r2 = 0.233, P = 0.001) had a weak correlation compared with moderate and high myopia (P = 0.272, P = 0.257, respectively). Twelve months later, the predictability, safety, and efficacy did not vary between preoperative flat and steep corneas (P > 0.05).Conclusions: One month after SMILE for myopia, the corneas were flatter in the preoperative flat corneas or all the low myopic corneas, and they were more overcorrected. However, preoperative corneal curvature does not influence visual outcomes at 1 year after SMILE.

show abstract

Influence of preoperative keratometry on refractive results after laser-assisted subepithelial keratectomy to correct myopia

Abstract: Preoperative corneal curvature did not seem to influence the spherical refractive outcomes after myopic LASEK.

Cited by 6 publications

References 32 publications

Effect of Flat Cornea on Visual Outcome after LASIK

Effect of Flat Cornea on Visual Outcome after LASIK

Effect of preoperative keratometry on visual outcomes after small-incision lenticule extraction for myopia

Effect of Preoperative Keratometry on Visual Outcomes After Small-incision Lenticule Extraction for Myopia

Contact Info

Product

Resources

About