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Arturo Abascal Espino, Oscar Fernandez; Evaluation of the progression of keratoconus after the placement of INTACS intrastromal segments. Invest. Ophthalmol. Vis. Sci. 2017;58(8):4316.
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© ARVO (1962-2015); The Authors (2016-present)
Literature has shown through some studies that the intracorneal segments are useful as a method to reduce or halt the progression of keratoconus. With this information, our paper’s main objective was to evaluate keratoconus progression after placement of INTACS intrastromal segments. Our hypothesis was that the placement of intrastromal segments would delay long-term keratoconus’ progression.
An ambispective, analytical and observational study was conducted; we included patients with keratoconus who had INTACS or INTACS SK intrastromal segments placed with at least two years of follow-ups. The statistical analysis included preoperative and postoperative measurements of LogMAR uncorrected visual acuity, sphere, cylinder, spherical equivalent and LogMAR best-spectacle corrected visual acuity.
Uncorrected visual acuity improved on the first month of the follow up (p = 0.002) and it remained stable throughout the next year (p = 0.115); the sphere value presented with a significant reduction (p = 0.034); there was no significant change over the cylinder’s value (p = 0.239); the spherical equivalent significantly decreased its value (p = 0.006); finally, the best-spectacle corrected visual acuity increased on a year being considered as our time for follow-up (p = 0.047).
Refractive and topographic results during a two year follow-up tend to stay stable, however, for the study to be statistically significant our case numbers are still limited.
This is an abstract that was submitted for the 2017 ARVO Annual Meeting, held in Baltimore, MD, May 7-11, 2017.
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