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您的检索式：作者名="Canan A.Utine"
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| 1 | Effect of intracorneal ring segment implantation on corneal asphericity显示文摘AIM: To evaluate the visual, refractive and corneal asphericity changes after intrastromal corneal ring segment(ICRS) implantation for visual rehabilitation of keratoconus.METHODS: A total of 42 eyes of 32 patients were included. After creation of intrastromal tunnels of 5.01±0.03 mm inner diameter, 5.71±0.03 mm outer diameter and at 384.21±34.12 μm depth, 1 or 2 ICRS of 150-300 μm thickness and 90°-210° arc length were implanted. Changes in uncorrected distance visual acuity(UDVA), corrected distance visual acuity(CDVA), refractive errors, mean simulated keratometry readings SimK_(avg), anterior and posterior corneal asphericity values(Q_(ant) and Q_(post), respectively) measured with Scheimpflug topography were evaluated retrospectively. RESULTS: There was a significant improvement in UDVA and CDVA, along with a significant decrease in refractive spherical equivalent(SE), cylinder and SimK_(avg) postoperatively(P<0.001 for all). Mean Qant increased from-1.06±0.48 to-0.57±0.58 postoperatively(P<0.001). Change in mean Qpost was insignificant(P=0.92). Postoperative changes in UDVA and CDVA were not correlated with the postoperative changes in SE and cylinder(P>0.05 for all); but were correlated with the preoperative SimK_(avg) and Q_(ant) values(P<0.001 for all). CONCLUSION: ICRS implantation seems to approximate the anterior corneal asphericity of 'advanced prolate' shape to 'optimal prolate' shape and an 'ideal Q value' of-0.46; which may have a role in improved UDVA and CDVA postoperatively, besides decreased refractive cylinder values. | Canan A.Utine Ziya Ayhan Ceren Durmaz Engin | 2018 | International Journal of Ophthalmology(English edition)2018，11，8： | 2 |
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