[ABSTRAK
Tujuan: Untuk mengevaluasi perbandingan ketebalan kornea dan morfologi sel endotel penderita miopia sedang dengan pemakaian harian lensa kontak lunak hidrogel konvensional (nelfilcon A) terhadap silikon hidrogel (lotrafilcon B) selama 1 bulan.Metode: Penelitian ini merupakan uji klinis tersamar tunggal pada 17 pasien (34 mata) dengan miopia sedang yang dibagi secara acak untuk memakai lensa kontak lunak nelfilcon A atau Lotrafilcon B. Ketebalan kornea sentral (CCT), Coefficient of variation (CV), dan persentase sel heksagonal (6A) diukur menggunakan mikroskop spekuler non-con robo Konan sebelum penelitian (pre-fitting), 1 minggu serta 1 bulan setelah pemakaian lensa kontak lunak. Pasien juga dievaluasi mengenai adanya efek samping subyektif dan komplikasi selama memakai lensa kontak.Hasil: Terdapat 64,7% subyek dengan riwayat pemakaian lensa kontak lunak sebelumnya, dimana 52,9% diantaranya adalah pemakai hidrogel konvensional yang tidak teratur. Setelah evaluasi 1 bulan, tidak didapatkan perbedaan yang bermakna antara pemakai Nelfilcon A dengan Lotrafilcon B dalam hal: ketebalan kornea sentral (p=0,285; uji Mann Whitney), CV (p=0,587; uji t tidak berpasangan), dan 6A (p=0,353; uji t tidak berpasangan). Analisis general linear model terhadap waktu pengukuran mendapatkan perbedaan yang bermakna pada seluru subyek meliputi penurunan CCT (p=0,001) dan CV (p=0,001), serta peningkatan 6A (p=0,022) pada test within subject effect.Simpulan: Tidak terdapat perbedaan CCT, CV, dan 6A yang bermakna secara statistik antara pada pemakaian harian lensa kontak lunak Lotrafilcon B dan Nelficon A. Pasien dengan riwayat penggunaan lensa kontak sebelumnya mendapatkan manfaat dengan pemakaian nelfilcon A dan lotrafilcon B dalam hal perbaikan hipoksia jaringan berupa: penurunan ketebalan kornea dan perbaikan morfologi sel endotel.

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ABSTRACT
Objective: To compare corneal thickness and endothelial cell morphology in myopic patients wearing 1 month hydrogel conventional and silicon hydrogel contact lenses in daily wear.Methods: This is a prospective, single blind, randomized study. Seventeen (34 eyes) myopic patients were randomly assigned to wearing either nelfilcon A or lotrafilcon B. Central corneal thickness (CCT), Coefficient of variation (CV), and percentage of six-sided cell (6A) were examined using specular microscope non-con robo Konan. Changes in CCT, CV, and 6A were evaluated before contact lenses fitting as well as 1 week and 1 month after the treatment. Patients were also evaluated for any subjective side effects and complications during the treatment period.Results: There were 64,7% subjects with history of contact lens weares and 52,9% of them was hydrogel wearers. After 1 month daily wear of nelfilcon A and lotrafilcon B, no statistically differences changes in CCT (p=0,285; Mann Whitney test), CV (p=0,587; unpaired t test) dan 6A (p=0,353; unpaired t test). General linear model analysis in follow up evaluation with test of within subject effect revealed decreased CCT(p=0,001) and CV (p=0,001), also increased 6A (p=0,022) in all subjects.Conclusions: There were no statistically difference CCT, CV, and 6A between daily wear of nelfilcon A and lotrafilcon B. Subjects with history of contact lens weares gained advantages in oxygen availability, which is decrease in corneal thickness and improvement of endothelial cell morphology., Objective: To compare corneal thickness and endothelial cell morphology in myopic patients wearing 1 month hydrogel conventional and silicon hydrogel contact lenses in daily wear.Methods: This is a prospective, single blind, randomized study. Seventeen (34 eyes) myopic patients were randomly assigned to wearing either nelfilcon A or lotrafilcon B. Central corneal thickness (CCT), Coefficient of variation (CV), and percentage of six-sided cell (6A) were examined using specular microscope non-con robo Konan. Changes in CCT, CV, and 6A were evaluated before contact lenses fitting as well as 1 week and 1 month after the treatment. Patients were also evaluated for any subjective side effects and complications during the treatment period.Results: There were 64,7% subjects with history of contact lens weares and 52,9% of them was hydrogel wearers. After 1 month daily wear of nelfilcon A and lotrafilcon B, no statistically differences changes in CCT (p=0,285; Mann Whitney test), CV (p=0,587; unpaired t test) dan 6A (p=0,353; unpaired t test). General linear model analysis in follow up evaluation with test of within subject effect revealed decreased CCT(p=0,001) and CV (p=0,001), also increased 6A (p=0,022) in all subjects.Conclusions: There were no statistically difference CCT, CV, and 6A between daily wear of nelfilcon A and lotrafilcon B. Subjects with history of contact lens weares gained advantages in oxygen availability, which is decrease in corneal thickness and improvement of endothelial cell morphology.]