Hoʻokaʻaʻike retina: nā kumu, nā ʻōuli, ka mālama ʻana

Hoʻokaʻaʻike retina: nā kumu, nā ʻōuli, ka mālama ʻana

ʻO ka retina, kahi membrane e pono ai i kā mākou ʻike, hiki ke kaʻawale i nā hanana nunui. He pilikia koʻikoʻi kēia, e ʻike ʻia i ka wā hiki loa e kaupalena i nā hopena.

Ke moe nei i ka hope o kā mākou maka, ʻo ka retina kahi membrane i hoʻopaʻa ʻia me nā ʻiʻiwi hopohopo a pili i ke aʻalolo optic. Aia ma luna ona e kiʻi ʻia ai nā kiʻi paʻi o nā kukuna mālamalama, ma mua o ka lawe ʻia ʻana i ka lolo. Eia naʻe, ʻaʻole ikaika kēia membrane. Hilinaʻi ia i nā mea ʻē aʻe ʻelua e hana i kahi maka piha. No laila hiki i ka retina hemo, hapa a hapa paha, hiki ke alakaʻi i kahi makapo huakai.

He aha ka hoʻokaʻawale retina?

Hana ʻia ka ʻōnohi maka o ke kanaka i ʻekolu mau ʻāpana o nā membrane i kāhea ʻia mau lole. Ka mua, ka tunic fibrous ʻo ia ka mea hiki iā mākou ke ʻike: keʻokeʻo, uhi ʻo ia i ka maka a hiki i ke kōkō i mua. ʻO ka lua, aia ma lalo pono, ka kapa tunu uveal (aiʻole uvée). Hana ʻia ia i mua o ka iris, a ma ke kua o kahi papa i kapa ʻia ʻo choroid. ʻO ka hope, ua kāpili ʻia i ke kapa komo uveal, ʻike mākou i ka mea kaulana kāʻei hoʻoweliweli, ka retina.

ʻO ka retina iho e wāwahi i nā papa like ʻole. No laila, ke kamaʻilio mākou no ka detachment o ka retina, aia ma luna o nā mea āpau o ka neural retina ua hoohalikeepithelium puaʻa, kona paia waho. He palupalu maoli kā lākou pili, a hiki i nā haʻalulu a i ʻole nā ​​leona ke alakaʻi i ka hoʻokumu ʻana o nā puka, kahi e komo ai kahi wai e like me vitreous, a hoʻonui i ke kaʻina kaʻawale.

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