Text

Sensitifitas Kontras pada Keadaan Hipoksia karena Terbang Tinggi dan Hubungannya denga Kadar Antioksidan Darah

Latar belakang: Hipoksia akan menyebabkan menurunnya fungsi penglihatan yang dinilai dengan uji sensitifitas kontras, hipoksia juga menyebabkan penurunan kadar antioksidan darah. Tujuan: untuk melihat apakah penurunan kadar antioksidan darah pada saat hiposia berkaitan dengan penurunan fungsi penglihatan yang dinilai dengan uji sensitifitas kontras. Metode: dilakukan penelitian terhadap 40 orang sampel. pemeriksaan sensitifas kontras dan kadar antioksiden darah pada setiap sampel dinilai dua kali yaitu pada saat diketinggian permukaan air laiut. Hasil: sensitifitas kontars terbukti menurun secara bermakna (p=0,006) pada ketinggian 18.000 kaki, kadar antioksidan tidak terbukti menurun secara bermakna (p=0,0058) pada ketinggian 18.000 kaki. tidak tampak adanya korelasi antara penurunan sensitifitas kontraks dan penurunan kadar antioksidan darah (P square=0.001; p=0.566).


Background: Hypoxia will result in the decreased fimction of vision which can be assessed with contrast sensitivity test Hypoxia is also suspected to cause a decrease in blood antioxidant level. Objective: To identity whether the decrease in blood antioxidant level.correlates with the decreased function of vision assessed with contrast sensitivity test. Methods: A study was performed in 40 sample subjects. The examination of contrast sensitivity and blood antioxidant level was performed in each sample and they were assessed twice, Le when there were on the sea surface and in the height simulation of 18 000 for Both result were compared in correlation. Results: Contrast sensitivity was found to decrease significantly (p=0.006) at the height of 18.000 feet. while blood oxidant level did not hour to decrease significantly (p=0.0055; it the height of 18.000 feet No correlation was found between the deceased contrast sensitivity and the decreased Hood antioxidat level (R square 0.001 p0566).