This paper reported a new method using tangential curvature to establish a mathematical model of the anterior cornea and an analysis of the regularity of the distribution of the asphericity Q. The curvature in the horizontal meridians is a prolate ellipse. The curvature in the vertical meridians is an oblate ellipse. The curvature of the horizontal meridians is important for anterior corneal asphericity.

本研究分析了運(yùn)用正切曲率半徑值建立人眼前表面角膜數(shù)學(xué)模型的科學(xué)性亚洲真人久久99精品，顯示角膜前表面水平子午線方向非球面性趨向于長橢圓日本黄色A片视频在线观看，垂直子午線方向非球面性趨向于扁橢圓欧洲欧美精品黄片，說明人眼角膜的非球面性特性主要由水平子午線實現(xiàn)在线精品视频小网站在线。

Abnormal expression of type Ⅰ～Ⅵ could be found in the onset of illness. The decreasing of collagen could causes the weaken of the stability of stroma lamellar and the cornea shap to conus. The onset of keratoconus is related to collagen

膠原Ⅰ～Ⅵ型的表達(dá)在圓錐角膜的發(fā)病過程中有明顯的變化美女做a，膠原成分的減少會導(dǎo)致角膜的機(jī)械抵抗力減弱欧美精品观看视频免费，并使角膜前凸變薄，最終影響角膜的正常形態(tài)日日干日日射日日操，圓錐角膜的發(fā)病與膠原密切相關(guān)樱桃视频iosapp。

The axial length, refraction power of cornea（K1 and K2）and anterior chamber depthwere determined by optic coherence biometryafter cycloplegia.

3 12歲近視兒童79例140眼經(jīng)門診睫狀肌麻痹后檢影驗光，采用光學(xué)相干生物測量儀測量其眼軸長度经典在线视频日韩精品免费播放、角膜屈光力（K191国在线视屏、K2）、前房深度日韩国产欧美免午夜网，計算眼軸長度與角膜曲率的比值A(chǔ)L/CR一本大道香蕉8中文在线视频，對測量值進(jìn)行統(tǒng)計分析。

Results The tiopronin in situ gel of 0.2 % sodium hyaluronate had proper gelating temperature and certain sustained releasing ability, Papp and retention time of which was 15.43 cm·s-1 and 130 min respectively, irritancy and stability were up to standard of ophthalmic preparation.

結(jié)果 含有質(zhì)量分?jǐn)?shù)0.2 %透明質(zhì)酸鈉的硫普羅寧原位凝膠具有適宜的膠凝溫度和一定的緩釋作用欧美色综合天天在线影院，其角膜表觀透過系數(shù)為15.43 cm·s-1美国午夜精品久久热，角膜前滯留時間為130 min；刺激性福利视频一区、穩(wěn)定性符合眼用制劑要求黄片在线高清免费看。

In the process of keratoconus, corneal mechanical resistance reduces. The function ofβig-h3 is going to be found out.

在圓錐角膜病變的發(fā)生過程中，角膜的機(jī)械抵抗力逐漸降低欧美性爱啊啊啊视频，角膜變薄前凸视频日韩最新无码迅雷下载，βig-h3在發(fā)病機(jī)制中所起的作用有待于進(jìn)一步探討。

Distributions of corneal curvature With the formula 〓 Sin〓αwhich is about the curvatures of oblique meridians on toric surface, the theoretical values of anterior, posterior and total corneal radius of curvature of the oblique meridians were obtained.

3角膜曲率分布根據(jù)托力克面斜軸子午線曲率F'計算公式〓一进一出黄色视频又免费又刺激又，確定角膜前日韩男女你懂的在线观看、后表面斜軸子午線曲率及斜軸子午線總角膜曲率的理論值，并通過分析該理論值與實測值之間的一致性www高清激情无码免费视频大全，明確角膜曲率分布特征黄色网站指引九九。

Objective: To determine a accurate method to measure ocular axial length,anterior chamber depth lens thickness and keratometry by calculating degrees of intraocular lens demand.

目的：通過對人眼球軸長、前房深度日本少妇的性爱视频、晶體厚度和角膜曲率的測定久久熟伦，探討它們之間的相關(guān)性，并把握如何精確測定眼球軸長https://1.igao73.com、角膜曲率來保證人工晶體的正確計算午夜在线精品视频。

Methods The central corneal thickness of 637 patients (1210 eyes) of myopia was measured with DGH-4000 pachymeter before and 1、3 month after LASIK.

應(yīng)用 DGH- 40 0 0型超聲角膜測厚儀分別測量6 37例(12 10只眼)近視患者在施行 L ASIK手術(shù)前及術(shù)后 1月、3月的角膜中央厚度国产迷系列视频在线观看应用；根據(jù)術(shù)前的屈光度分為 4組日本精品一级二级三级在线，對各組所測得角膜中央厚度的數(shù)值進(jìn)行分析。

The animal model of rabbit bullous keratopathy was established by anterior chamber injection with 0.05% benzalkonium bromide. The corneal thickness and corneal endothelial cell density were measured with ultrasonic corneal pachymeter and non-contact specular microscope separately before the animal models was established.

二欧美大黄片一级、以0.05%的新潔爾滅溶液前房注射制作兔眼大泡性角膜病變的動物模型国产一区精品在线免费，制模前分別用角膜測厚儀和角膜內(nèi)皮顯微鏡測量角膜厚度和角膜內(nèi)皮細(xì)胞數(shù)目。

Surgical excision can significantly improve induced abnormal corneal topographic changes and reduce corneal astigmatism from pterygia.

翼狀胬肉切除術(shù)能明顯減少角膜散光日韩,亚洲,欧美，改善術(shù)前角膜地形圖的不規(guī)則形態(tài)永久福利影院，有利于提高視力和視覺質(zhì)量。