May 2003
Volume 44, Issue 13
Free
ARVO Annual Meeting Abstract  |   May 2003
Corneal Sensivity and Tear Secretion after LASIK
Author Affiliations & Notes
  • M.G. Rego
    Ophthalmology/Retina, Sch of Medicine-Ribeirao Preto, Ribeirao Preto-SP, Brazil
  • A.J. Rodovalho
    Ophthalmology/Cornea, Sch of Medicine-Ribeirao Preto, Instituto de Olhos de Goiânia, Brazil
  • J. Nassaralla
    Retina and Vitreous, Instituto de Olhos de Goiania and Federal University of Minas Gerais, Goiania, Brazil
  • B.A. Nassaralla
    Cornea and Refractive Surgery, Instituto de Olhos de Goiania, Goiania, Brazil
  • Footnotes
    Commercial Relationships  M.G.B. Rego, None; A.J.M. Rodovalho, None; J. Nassaralla, None; B.A. Nassaralla, None.
Investigative Ophthalmology & Visual Science May 2003, Vol.44, 2456. doi:
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    • Get Citation

      M.G. Rego, A.J. Rodovalho, J. Nassaralla, B.A. Nassaralla; Corneal Sensivity and Tear Secretion after LASIK . Invest. Ophthalmol. Vis. Sci. 2003;44(13):2456.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Abstract: : Purpose: To evaluate the changes in corneal sensitivity and tear secretion after laser in situ keratomileusis (LASIK). Methods: A total of thirty-eight eyes of nineteen patients, 9 men and 10 women, submitted to myopic LASIK surgery were studied. The mean spherical equivalent before surgery was –3,79D (± 1,29). Corneal sensitivity was tested using Cochet-Bonnet esthesiometer in the central cornea. Tear secretion and tear film instability were tested using Schirmer test values, tear break-up time and basal tear secretion test. Examinations were performed preoperatively and 7, 30, 90,180 and 270 days postoperatively or until recovery of the preoperative values. Results: Median preoperative corneal sensitivity was 60mm (range, 50 to 60mm); median Schirmer test was 21,5 mm (range, 10 to 30mm); median basal secretion was 11,5 mm (range, 6 to 20mm); median break-up time test was 16,0 seconds (range, 8 to 22 seconds). Corneal sensitivity and tear secretion returned to their preoperative values between 90 to 180 days after surgery. During the follow-up, 5 patients (10 eyes) did not present any dry eye symptom. Conclusions: It was found that corneal sensitivity and tear secretion are decreased as long as 6 months after LASIK. When 73,6% of the cases had symptoms of dry eye during the follow up. Further investigations are advisable to best evaluate effects in the corneal physiology after LASIK.

Keywords: cornea: tears/tear film/dry eye • refractive surgery: LASIK • refractive surgery: complications 
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