How the eye works

The eye is a spherical structure. It has a transparent front side which is the cornea. The wall of the eye beyond the cornea consists of three tissue layers. The outermost layer is the sclera, a tough protective coating that covers the outer surface of the eye. The middle layer is the choroid, which is a vascular layer that is continuous with the ciliary body and the iris on the anterior part of the eye. The inner layer is the retina, a light-sensitive tissue that lines the inside back wall of the eye. The eye is more complex than a camera, but the principle of how it functions is similar.

眼球運作的原理
眼睛是一個球體組織。眼球最前端的透明組織名叫眼角膜。眼球的後面由三層不同的組織包圍着。眼球最外層是堅韌的鞏膜(眼白),可保護眼球内部。中間那層是脈絡膜,由複雜的血管組織連接到前方的睫狀體和虹膜。眼球的最内層是視網膜,有感光細胞負責接收影像。相機雖然沒有眼睛般精密,但結構和運作上亦有相似的地方。


 

Click on Patient Education to search and open specific eye conditions.

點擊''病人資訊''以了解更多眼疾