The ido a matsayin Tantancewar tsarin - wani sosai nagartaccen na'urar.

The ido a matsayin Tantancewar tsarin kunshi yawa aka gyara. Kowane abun ne na musamman da kuma Sankiran. A total na 12 sassa. Dukan su taimaka mana cikin wahayi na duniya.

The aka gyara bayyane daga waje

A farko bangaren da cewa muna ganin - da eyeball. Its diamita ne yawanci 2.5 cm a wasu mutane -. More, wasu x - kasa.

Apple aka rufe da uku membranes. A farko - mai tauri sclera, wanda kare shi daga daban-daban diyya. Next - choroid. Yana amfanin jiki da ido. Kuma a karshe, na karshe - bakan gizo. Yana da wannan harsashi ba "launi" ga idanun mutane. Yana da wani kananan rami: da almajiri.

Abin da ke ciki, ko ta yaya muka gani?

The ido a matsayin Tantancewar tsarin aiki ci gaba. Ko a lokacin da muka yi barci, Apple ne a motsi. Da samun a cikin wani sarari, wannan nagartaccen na'urar farawa ci gaba da aiki.

Da farko kunna almajiri. Ya Narrows ko yana faɗaɗa dangane da wurin haske. Idan duhu, ya zama mafi girma, dã haske - kasa.

Bugu da ari bayanai da aka bayar a kan ruwan tabarau (biconvex ruwan tabarau) da kuma cornea. Tare da suke samar da wata irin mai da hankali ruwan tabarau. Eh, da idanu kamar yadda Tantancewar tsarin - wani hadadden da kuma musamman na'urar.

Cornea - a mafi muhimmanci bangaren fiye da ruwan tabarau, kamar yadda wasa muhimmiyar rawa a mayar da hankali da kuma refraction haske. Yana yana da wani barga hali - ta ne immobile. Amma idanu ba zai iya ganin na kusa da na nesa. Kuma a sa'an nan ya zo da taimakon da ruwan tabarau. Nan take canza ta curvature, shi ba ka damar gani. Irin wannan curvature bayan da saiti ido ga abu ne ake kira masauki.

A lokaci guda, to la'akari da cewa an located kusa, tsokoki da zuwa zuriya sosai karfi. Irin wannan overvoltage iya haifar da myopia ko hyperopia.

zurfi

Refracted haskoki fada a kan haske a jikin, wanda sa'an nan Forms wani inverted image daga cikin abu. Duk da haka, da ido a matsayin Tantancewar tsarin, shi ne na musamman, da kuma kwakwalwa na'am da irin wannan hoton, wanda shi ne dace don mu.

A retinal rabe ne ma gani: sandunansu (130m) da kuma Cones (7 mn). A farko ne alhakin hangen nesa a cikin duhu, na biyu - a cikin haske. Saboda haka, shi ne Cones bayan wata rikitarwa photochemical dauki ake kawota cikin kwakwalwa na wani launi hoto. Akwai uku launi (ja, kore, da shuɗi da shunayya), wanda, hadawa, samar da wani arziki image launuka. An tabbatar da cewa mutanen blue Cones ne sosai ma lo, kuma suka kusan ba rarrabe launi.

Kishiyar da almajiri ne rawaya tabo ko wani wuri a cikin abin da akwai kawai Cones. A nan ne da sharpest image an kimanta. Idan mutum ya dubi da aka ta atomatik gyara ga ido don haka da cewa ɓangare na abu ya shiga wannan sashi. Sai hoto yana daukar kwayar cutar a cikin kwakwalwa ba tare da murdiya.

The bayanai a tsakiyar dukan rayuwar mutum zo ta hanyar da na gani jijiya. Wannan shi ne shugaba, yada hoto.

A magudanun ruwa tsarin da ido yana mai m aiki. Wannan shi ya kawo hawaye don moisturize duk wannan na'urar. Bugu da ƙari, cikin ruwa wanke tafi da datti da kuma kare da cutarwa kwayoyin. Hawaye ne sosai zama dole mu jiki.