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題名:高空缺氧環境下配戴各式隱形眼鏡之觀察     (16點)
CHANGES EXPERIENCED BY USERS OF DIFFERENT CONTACT LENSES AT SIMULATED HYPOXIC ALTITUDES
著者:劉峻正(Chun-Cheng Liu) ;蔡明霖(Ming-Ling Tsai) ;陳建同(Jiann-Torng Chen) ;項正川(Jeng-Chuan Shiang) ;張雲翔(Yun-Hsiang Chang) ;黃敬堯(Ching-Yao Huang) ;徐文錦(Wen-Jin Hsu) ;洪啟庭(Chi-Ting Horng)
出版地區:台灣
出版城市:台北市
學科:醫學綜合
關鍵字:Sub-contact lens bubble ; low pressure chamber
刊名:中華民國眼科醫學會雜誌
卷期:48卷1期(2009.3)
頁碼:19-26
語言:繁體中文
摘要: 中文摘要PDF ; 英文摘要PDF

目的:分析高空缺氧環境下,配戴各種隱形眼鏡之變化,並觀察 暴露後之症狀。 材料:本文報告別位男性志願者,第一組30 位配戴軟式隱形眼 鏡(再依含水量75% 、55% 、38% 等,再區分為A 、B 、C 三小組)、第 二組配戴PMMA 片,第三組則配戴RGP 片,每位受志願者之矯正視 力為20120 。依序於低壓艙內,戴上氧氣面罩,逐漸抽離艙內空氣, 模擬逐漸上升之缺氧環境。每上升5000 呎即以裂隙燈觀察鏡片下之 變化,同時記錄其視力,一直到25000 呎為止。隨後以相反步驟加入 氧氣,象徵返回地面並完成實驗,步出艙後立刻卸除隱形眼鏡,再一 次觀察其角膜與結膜情形。 結果:在第一A 組中發現在5000 呎峙, 80% 的案例出現氣泡(部 份出現在角膜中央者其視力降至20/30) ;第一B 組(60%)在5000 呎與 第一C 組(50%)在10000 呎'出現鏡片下小氣泡。第二組PMMA 片 者,全部在20000 呎於鏡片下角膜中央處出現明顯的大氣泡(視力降 低至20/40) 。第三組配戴RGP 片,僅10% 的受測者在10000 呎出現 鏡片旁小氣泡。另外卸下隱形眼鏡後發現因缺氧之故,所有志願者或 多或少都有角、結膜病變。 結論:高空缺氧環境下配戴各類型隱形眼鏡,部份出現鏡片下氣 泡,可能會影響視力與造成後績的角、結膜病變。但民航機因有座艙 加壓的設備,使得發生鏡片下氣泡之比例減少。但是配戴隱型眼鏡執 勤的軍機飛行員,因機種不同,是否因此而影響飛行安全,值得個別 言平估。
Purpose: To evaluate the changes experienced by contact lens users wearing different types of contact lenses during and after exposure at simulated hypoxic altitudes. Methods: We studied the right eye of 50 male volunteers in a low-pressure chamber that simulated various altitudes. The subjects were divided into three groups. Group 1 comprised soft contact-lens users; Group 2, PMMA-lens users; and Group 3 RGP-lens users. Group 1 was further divided into three subgroups according to the water contents of the contact lenses (1A: 70%, 1B: 55%, 1C: 38%). Corrected visual acuity was also measured. The subjects were examined under slit-lamp after every 5000-foot change in elevation. Up to the height of 2500。此, extra room-air was re-supplied step by step, and al1 the volunteers retumed to the sea-level without incident. After exposure, we also examined the changes in conjunctiva and comea. (Why use 'ft' and not 'm' for the distance measurement?) Result: In Group 1A, air bubbles were present at the edge and central part of the lens at 5000 ft in 80% of the cases. In 60% of the cases in Group 1B and 50% of the cases in Group 1 C, smal1 bubbles appeared at 5000 ft and 10000 ft, respectivel子In the PMMA-lens group, al1 cases had large air bubbles found in the central portion of lens at 20000 此, and BCVA decreased. In the RGP-lens group, only 10% of the cases had smal1 bubbles that appeared at lens margin at 10000 ft. After exposu間, conjunctival i吋ection and punct的e epithel凶 keratitis were found in al1 volunteers. Conclusion: Air bubbles might be found under various types of contact lens at simulated hypoxic altitudes. Visual acuity worsened in some situations. After exposure, conjunctival and comeal changes were found due to hypoxia. In commercial aircraft, the percentage of air bubbles appearing under the lens may decrease due to cabin pressure. Military aircrews wearing contact lens are likely to experience air-bubbles formed under the lens when working at high altitude. This may result in future physiological and visual degradation.


    

本卷期目次
中華民國眼科醫學會雜誌 48卷1期 (2009.3)
治療葡萄膜炎之免疫抑制藥物依實證醫學的使用原則:至2008年相關文獻回顧第二部份:非類固醇免疫抑制劑於葡萄膜炎治療的使用原則/ 黃奕修陳墩祿楊克仁
CURRENT DEVELOPMENT IN SOFT CONTACT LENS/ Wei-Chieh ChiuYih-Shiou HwangJiahn-Shing LeeKen-Kuo Lin
周腦室白質軟化症呈現類似青光眼之視神經盤變化--病例報告/ 胡家豪鄧美琴陳勇仁林淑妍
高空缺氧環境下配戴各式隱形眼鏡之觀察/ 劉峻正蔡明霖陳建同項正川張雲翔黃敬堯徐文錦洪啟庭
OPEN ANGLE GLAUCOMA ASSOCIATED WITH OSTEOGENESIS IMPERFECTA/ Shuai-Chun LinJui-Ling Liu(Catherine)Tsung-Yu HoFenq-Lih Lee
OPHTHALMOPLEGIA AND OPTIC NEUROPATHY AFTER EMBOLIZATION OF EXTERNAL AUDITORY CANAL TUMOR: A CASE REPORT/ Ya-Chi ChenYu-Hung Lai
GUNSHOT-RELATED PERIORBITAL METALLIC FOREIGN BODIES--CASE REPORTS/ Chien-Hui LinJieh-Ren Jou
PHOTOREFRACTIVE KERATECTOMY WITH MITOMYCIN-C AFTER UNDERCORRECTED RADIAL KERATOTOMY/ Li-Wei ChenHuey-Chuan Cheng
SIGNIFICANT TUMOR REDUCTION OF EXTENSIVE CONJUNCTIVAL SQUAMOUS CELL CARCINOMA BY RADIOTHERAPY WITH ADJUVANT TOPICAL 0.04% MITOMYCIN C TREATMENT/ Yen-Shou ChouMing-Ling TsaiChi-Ting HorngChia-Hung LiJian-Tong Chen
INFECTIVE ENDOCARDITIS PRESENTING AS SUDDEN UNILATERAL VISUAL LOSS--A CASE REPORT/ Hung-Chiao ChenShu-Tak HoChing-Yun KaoWen-Kai Kuo
EXPRESSION OF MATRIX METALLOPROTEINASE-9 IN CORNEAL HEMOSIDEROSIS--A CASE REPORT/ Shih-Yi YangKo-Hua ChenAn-Hang YangShui-Mei Lee
ACUTE TOTAL KERATOLYSIS OF TRICHOPHYTON FUNGAL KERATITIS-- CASE REPORT/ Ta-Ching ChenYi-Hui ChiangPo-Ting YehFung-Rong HuWei-Li Chen
SUCCESSFUL TREATMENT FOR LONG-TERM PERSISTENT SUBMACULAR FLUID UNDER FOVEAL DETACHMENT AFTER SCLERAL BUCKLING SURGERY/ Hsin-Wei HuangMuh-Shy ChenTzyy-Chang Ho
CANCER ASSOCIATED RETINOPATHY (CAR) IN A PATIENT WITH UNFAVORABLE VISUAL OUTCOME AFTER CATARACT SURGERY: CASE REPORT/ Hsiu-Yi LinChang-Hao YangChung-May Yang
OCULAR LEECH INFESTATION--A CASE REPORT/ Yu-Chien WuPo-Min YangChong-Bin TsaiChau-Yi TanKuo-Pin Chang
MONOCULAR TEMPORAL HEMIANOPIA IN A YOUNG ADULT WITH SEPTO-OPTIC DYSPLASIA--A CASE REPORT/ Chun-Chang LinI-hua WangSzu-Yuan LinJieh-Ren Jou
 
   
 
   

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