I-Anatomy yegalari yezithombe zezithombe

Umhlahlandlela Wokuboniswa Ku-Anatomy Ye-Human Eye

1 -

I-Basic Eye Anatomy

I-anatomy yeso liyinkimbinkimbi, equkethe izingxenye ezimbalwa ezibalulekile. Ikhono lokubona lixhomeke kulezi zingxenye zisebenza ndawonye. Sisebenzisa amehlo ethu cishe yonke imisebenzi esenzayo. Amehlo asivumela ukuba sibone ubujamo, imibala, nobukhulu bezinto ngokucubungula ukukhanya ababonisayo. Amehlo ethu akwazi ukukhanya ekukhanyeni noma ekukhanyeni, kodwa abakwazi ukubona izinto lapho ukukhanya kungekho. Igalari elandelayo yesithombe iyisiqondiso sezingxenye eziningi zeso lomuntu nokuthi ziyasebenza kanjani.

Ukukhanya kungena iso ngokusebenzisa i-cornea, ungqimba olucacile olubheke phambili kweso. I-cornea isebenza ne-lens yeso ukugxila izithombe ku-retina. Amajwabu angenhla nangaphansi avikela iso ekulimazeni, nge-eyelashes eyenza isivinini sokuzivikela.

2 -

I-Anatomy yangaphandle neyangaphakathi

I-cornea ivumela ukukhanya ukungena iso. Njengoba ukukhanya kudlula ngeso, iris iguqula isimo ngokukhulisa nokuvumela ukukhanya okwengeziwe. Noma, ibeka futhi ivumela kancane ukukhanya ukushintsha ubukhulu bomfundi. I-lens ishintsha ushintsho ukuze kuvunyelwe ukunemba okuqondile kokukhanya ku-retina. Ama-photoreceptors esweni ahambisa izimpawu zesibindi ngokusebenzisa i-nertic optic kuya ebuchosheni. Ubuchopho busebenza kulezi zindlela ezibonakalayo.

3 -

I-Lateral Eye Anatomy

I-cornea ingilazi yokubuka ecacile efakwe phambi kweso. I-cornea isebenza ne-lens yeso ukugxila izithombe ku-retina. I-retina ithatha isithombe bese isithumela ebuchosheni ukuba ithuthukiswe. I-retina ivame ukubomvu ngenxa yokunikezwa kwegazi elicebile.

4 -

I-Anatomy ye-Eye Lens

I-lens inesibopho sokuqinisekisa ukuthi imisebe yokukhanya igxile kakhulu ekutheni i-retina. I-lens yeso ngokuvamile ivaliwe. Uma i-lensi iba nkulu noma ivuliwe, ibizwa ngokuthi i-cataract.