第6课

第六课

Lesson six

照相机和眼睛

Camera and eyes

1.凸透镜，纸盒，半透明纸，剪刀，胶水 。

Convex lens, carton, translucent paper, scissors, glue.

2.做个“照相机”，玩一玩。

Make a "camera" and play with it.

3.眼睛是怎样看到物体的 ？

How does the eye see objects?

（1） 眼睛和照相机 ……

Eyes and cameras

（2）晶状体很像 ……

The lens is very much like

晶状体 ，视网膜 ，视神经 ，瞳孔

Lens, retina, optic nerve, pupil

美丽的花 ！

Beautiful flowers!

     眼睛的主要部分是眼球 。

The main part of the eye is the eyeball.

     来自物体的光通过瞳孔 ，晶状体进入眼睛后 ，会在视网膜上形成这些物体的像 。连接视网膜的视神经 立即把这些光信号报告给大脑，我们就看到这些物体了 。来自物体的光在视网膜上形成的是倒像 ，人脑能自动调节倒立的视觉信号 ，形成立体的视觉 。

When light from objects passes through the pupil and the lens enters the eye, it forms images of these objects on the retina. The optic nerve connecting the retina immediately reports these light signals to the brain, and we see these objects. The light from the object forms an inverted image on the retina. The human brain can automatically adjust the inverted visual signal to form a three-dimensional vision.

4.查阅资料 ，了解动物眼睛的构造 。

Look up materials to understand the structure of animal eyes.