學(xué)英語(yǔ)-眼睛-The-EyePPT優(yōu)秀課件_第1頁(yè)
學(xué)英語(yǔ)-眼睛-The-EyePPT優(yōu)秀課件_第2頁(yè)
學(xué)英語(yǔ)-眼睛-The-EyePPT優(yōu)秀課件_第3頁(yè)
學(xué)英語(yǔ)-眼睛-The-EyePPT優(yōu)秀課件_第4頁(yè)
學(xué)英語(yǔ)-眼睛-The-EyePPT優(yōu)秀課件_第5頁(yè)
已閱讀5頁(yè)，還剩7頁(yè)未讀， 繼續(xù)免費(fèi)閱讀

下載本文檔

版權(quán)說(shuō)明：本文檔由用戶提供并上傳，收益歸屬內(nèi)容提供方，若內(nèi)容存在侵權(quán)，請(qǐng)進(jìn)行舉報(bào)或認(rèn)領(lǐng)

文檔簡(jiǎn)介

1、EYE,The eye is an extension of the brain,Eye brain proxomity,Can you see : the optic nerve bundle? Spinal cord,Cross section,You must know the position of: Retina Lens Cornea Sclerotic Optic nerve Cilary muscles Suspensory ligaments,Retina receives the image,Full of light receptors which are sensiti

2、ve to: Colour Light levels Massive blood supply is also needed,Fovea is the main focal point and has greatest density of light receptors,Retina receptors,Light receptors are called rods and cone,Focusing on objects,The lens and cornea focus the light on the retina,Focusing,The lens job is to make th

3、e rays hit the same point The red rays will be out of focus,Bending light,Light is refracted and bent to focus it as it passes through the lens Lens thickness can be changed so the amount of bending is changed,Near vision,to bend the light more to focus it Fat lens needed,Distance vision,Rays enter

4、the eye closer together Need less bending Thinner lens needed,Changing lens thickness,The lens is slightly elastic, its relaxed state is short and fat,Cilary muscles are attached to the lens, when contracted they pull the lens thin,Controlling light levels,Your eye are very sensitive and can be damaged by harsh light. Your iris contr

溫馨提示

  • 1. 本站所有資源如無(wú)特殊說(shuō)明，都需要本地電腦安裝OFFICE2007和PDF閱讀器。圖紙軟件為CAD,CAXA,PROE,UG,SolidWorks等.壓縮文件請(qǐng)下載最新的WinRAR軟件解壓。
  • 2. 本站的文檔不包含任何第三方提供的附件圖紙等，如果需要附件，請(qǐng)聯(lián)系上傳者。文件的所有權(quán)益歸上傳用戶所有。
  • 3. 本站RAR壓縮包中若帶圖紙，網(wǎng)頁(yè)內(nèi)容里面會(huì)有圖紙預(yù)覽，若沒(méi)有圖紙預(yù)覽就沒(méi)有圖紙。
  • 4. 未經(jīng)權(quán)益所有人同意不得將文件中的內(nèi)容挪作商業(yè)或盈利用途。
  • 5. 人人文庫(kù)網(wǎng)僅提供信息存儲(chǔ)空間，僅對(duì)用戶上傳內(nèi)容的表現(xiàn)方式做保護(hù)處理，對(duì)用戶上傳分享的文檔內(nèi)容本身不做任何修改或編輯，并不能對(duì)任何下載內(nèi)容負(fù)責(zé)。
  • 6. 下載文件中如有侵權(quán)或不適當(dāng)內(nèi)容，請(qǐng)與我們聯(lián)系，我們立即糾正。
  • 7. 本站不保證下載資源的準(zhǔn)確性、安全性和完整性, 同時(shí)也不承擔(dān)用戶因使用這些下載資源對(duì)自己和他人造成任何形式的傷害或損失。

最新文檔

評(píng)論

0/150

提交評(píng)論