眼科学基础
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+43 diopter lens
2020/6/3
8
The radius of cornea curvature in front 7.8mm
The central thickness 0.6mm
The radius of cornea curvature in back 6.8mm
The periphery thickness 1mm
⑤内皮细胞层 Endothelium
2020/6/3
10
2020/6/3
Epithelium Basement layer Bowman’s membrane
Stroma
Descemet’s membrane endothelium
regenerate after injery
11
(2)巩膜 Sclera
2020/6/3
9
组织学分层 from anterior to posterior,the cornea has five distinct layers:
①上皮细胞层 Epithelium
②前弹力层 Bowman’s membrane
③基质层
Stroma
④后弹力层 Descemet’s membrane
2020/6/3
3
The globe is composed of the eyecoats,the contents.
2020/6/3
4
The eyecoat is mainly divided into three layers.
Outer layer Cornea Sclera
Middle layer Iris Ciliary body Choroid
第一章 眼科学基础 Chapter one
Basic ophthalmology
来自百度文库
2020/6/3
1
第一节 眼的组织解剖 anatomy of eyeball
眼球 The globe (eyeball) anterior and posterior distance of
normal eyeball is 16mm in born. At age 3 23mm. At adult 24mm.
Anterior part covered by bulbar conjunctiva Connected to 6 extraocular muscles Thinner and translucent in children
2020/6/3
13
角 巩 膜 缘 the cornea
scleral limbus :is a
Inner layer
Retina
2020/6/3
5
外层 The outer coat
The outer coat consists of the cornea and the sclera.
The anterior one sixth is transparent cornea,other five sixths is white sclera.
The difference of the two eyes is usually less than 2mm.It is easy to be injuried,especially in its external part,the anterior part of the globe is protected by the eyelids.
7
角膜 Cornea
前表面曲率半径 The radius of cornea curvature in front
7.8mm 后表面曲率半径 The radius of cornea curvature in back
6.8mm Its refractive power is equal to that of
组织学分层 the sclera includes:
①表层巩膜 The episclera ②巩膜实质层 The scleral stroma ③棕黑板层 The lamina fascia
2020/6/3
12
Sclera
Thickness: 0.3 to 1.0 mm,at the insertion of the rectus musles,it is about 0.3mm, elsewhere about 1mm.
横径The horizontal diameter is 11.5-12mm 垂直径The vertical diameter is 10.5-11mm 中央部 The central thickness 0.6mm 周边部 The periphery thickness 1mm
2020/6/3
Its width is 1 mm
Surgical landmark of important structures
2020/6/3
14
前房角 Anterior chamber angle:
The transitional srea of both is the limbus. The function is to maintain the shape of the
globe and to protect inteaocular tissue.
2020/6/3
6
（1）角膜 Cornea
2020/6/3
2
The vetical one is average23mm，the horizontal one is average 23.5mm in normal adult.
The anterior pole of the globe,protruded about 12-14mm bryond the prbital rim.
transitional zone of the
cornea
and
the
scleral,where the cornea
inserts into the sclera
its anterior border is Bowman’s layer
Its posterior margin is Descemet’s membrane
2020/6/3
8
The radius of cornea curvature in front 7.8mm
The central thickness 0.6mm
The radius of cornea curvature in back 6.8mm
The periphery thickness 1mm
⑤内皮细胞层 Endothelium
2020/6/3
10
2020/6/3
Epithelium Basement layer Bowman’s membrane
Stroma
Descemet’s membrane endothelium
regenerate after injery
11
(2)巩膜 Sclera
2020/6/3
9
组织学分层 from anterior to posterior,the cornea has five distinct layers:
①上皮细胞层 Epithelium
②前弹力层 Bowman’s membrane
③基质层
Stroma
④后弹力层 Descemet’s membrane
2020/6/3
3
The globe is composed of the eyecoats,the contents.
2020/6/3
4
The eyecoat is mainly divided into three layers.
Outer layer Cornea Sclera
Middle layer Iris Ciliary body Choroid
第一章 眼科学基础 Chapter one
Basic ophthalmology
来自百度文库
2020/6/3
1
第一节 眼的组织解剖 anatomy of eyeball
眼球 The globe (eyeball) anterior and posterior distance of
normal eyeball is 16mm in born. At age 3 23mm. At adult 24mm.
Anterior part covered by bulbar conjunctiva Connected to 6 extraocular muscles Thinner and translucent in children
2020/6/3
13
角 巩 膜 缘 the cornea
scleral limbus :is a
Inner layer
Retina
2020/6/3
5
外层 The outer coat
The outer coat consists of the cornea and the sclera.
The anterior one sixth is transparent cornea,other five sixths is white sclera.
The difference of the two eyes is usually less than 2mm.It is easy to be injuried,especially in its external part,the anterior part of the globe is protected by the eyelids.
7
角膜 Cornea
前表面曲率半径 The radius of cornea curvature in front
7.8mm 后表面曲率半径 The radius of cornea curvature in back
6.8mm Its refractive power is equal to that of
组织学分层 the sclera includes:
①表层巩膜 The episclera ②巩膜实质层 The scleral stroma ③棕黑板层 The lamina fascia
2020/6/3
12
Sclera
Thickness: 0.3 to 1.0 mm,at the insertion of the rectus musles,it is about 0.3mm, elsewhere about 1mm.
横径The horizontal diameter is 11.5-12mm 垂直径The vertical diameter is 10.5-11mm 中央部 The central thickness 0.6mm 周边部 The periphery thickness 1mm
2020/6/3
Its width is 1 mm
Surgical landmark of important structures
2020/6/3
14
前房角 Anterior chamber angle:
The transitional srea of both is the limbus. The function is to maintain the shape of the
globe and to protect inteaocular tissue.
2020/6/3
6
（1）角膜 Cornea
2020/6/3
2
The vetical one is average23mm，the horizontal one is average 23.5mm in normal adult.
The anterior pole of the globe,protruded about 12-14mm bryond the prbital rim.
transitional zone of the
cornea
and
the
scleral,where the cornea
inserts into the sclera
its anterior border is Bowman’s layer
Its posterior margin is Descemet’s membrane