Njani yeso.

Yeso, okanye ngaba umbutho obonayo, nangona ubukhulu bayo isinciphiso, kukho isakhiwo entsonkothileyo kakhulu yokwakheka. Embi le umzimba elimile sphere, nto leyo kakhulu nigqibelele, njengoko nesabelo salo ngaphambili bubonakalayo a ugobile enkulu ukusuka kumphezulu ongasemva kunokuba efihliweyo. Oku kugqiba ubungakanani kunye nokwahluka amehlo kumacala ahlukeneyo. Ngenxa convexity lomzimba inwebu cipande-ngomva kubungakanani inkulu. Kwi-avareji, impilo yabantu abadala, yena usondele-24 mm. Ezinqamlezayo kunye axis nkqo malunga ncam: ubungakanani umndilili axis ezinqamlezayo ye iliso 23.6 mm kunye 23.3 mm kwi nkqo.

Ubume lweliso lakho

Lo umbutho mbono, kukho iqokobhe ezintathu ezinkulu ukuba enze imisebenzi enomahluko.

1. esingxotyeni lwangaphandle okanye ezinezikhondo. Ichonge iinxalenye ezimbini, leyo kakhulu ayaba anatomically. Le nxalenye inkulu ingubo ezinezikhondo ngowam sclera, okanye tunica albuginea, kwaye abanye - i inwebu. Le sclera na ilaphu ngokupheleleyo non-selubala, nto leyo iba nombala ezimhlophe. Ngqo ngenxa yebala labo, lweliso lakho, ingakumbi inxalenye ngaphaya kwe kwiproteni uye wabizwa. Ukuziqhelisa kwezonyango, njengoko sclera bangabhaqa iimeko ezahlukeneyo zophendlo lwezifo ukuba kwenzeka iso emzimbeni xa iyonke. Ngoko ke, ububomvu lweliso lakho singachaza ukudumba etsolo kweli isebe yombono: conjunctivitis, keratitis, uveitis, njl A tunica albuginea ubungqina engangqalanga yellowing wesifo zesibindi - Hepatitis. Yeso, nto leyo ebonisa ukuba ngaphambili kunye inwebu ivela kule ndawo zipeyintwe brown, oluhlaza, okanye oluhlaza. Noko ke, asiyiyo inwebu kwaye iris iyabonakala kulo. Le alikhazimli ezingenambala ngokupheleleyo kwaye selubala, akukho imithambo yegazi, iklasta kuphela kwalapho, avumele ukuba le nxalenye vakalelo yomzimba. Ukuba yeso uchazwa njengepesenti iinxalenye esingxotyeni salo ezinezikhondo, ngoko ke inwebu akhawunti kuba ngaphantsi kwe-16%.
2. Avareji, okanye choroid. Kuyinto ezikufutshane ezinezikhondo, kodwa hayi ngokupheleleyo, kodwa kuphela xa inxalenye yayo scleral. Apho sclera iya inwebu, indlela imithambo abazahlulayo kulo kwaye wesikolo bebekwe ngokwahlukeneyo omnye ukusuka inwebu. Iqokobhe eliphakathi ukwahlula iinxalenye ezintathu: iris, ciliary (ciliary) emzimbeni , kunye choroid. Iris lisebenza kovalo, elawula wobhobhozayo ezikhanyayo ukuya nzulu amehlo akhe, izakhiwo zakhe svetovosprinimayuschim. umsebenzi Umlawuli kuthatha umfundi, nto leyo ukwandisa xa ukukhanya ukushiyeka, emxinwa - kwemfuneko yayo. Iqumrhu ciliary kuyimfuneko odala ulwelo rhoqo intraocular efunekayo lokondla iliso, ka ayigcine ilizwi. Le choroid, okanye choroidal, amelwe womnatha ezinemigca usinika nezakhiwo zangaphakathi iso.
3. Lwangaphakathi okanye retina. Le ndawo ibalulekileyo licandelo umbono esihoyana ukukhanya edlulisela inkcazelo ezifunyenwe ezibonakalayo kwi ebuchotsheni izakhiwo cortical. Retina - inyama obhityileyo kakhulu yaye ubuthathaka, nto leyo idla ezichongiweyo iinkalo ezimbini eziphambili: i ciliary leyo iiseli ngokwahlukeneyo kakhulu, yaye umsebenzi enombala apho ezi iiseli. ngokwahlukana (umgca ezitsolo) bunokubonwa ekuhambeni kophando ezifana tsikloskopiya xa ehlola fundus.

Yeso amaqokobhe ngaphandle ngaphakathi vitreous, nto leyo ulunika imilo mpawu ajikelezayo kwaye inxaxheba refraction kunye ilens, nto leyo inxaxheba kwiinkqubo accommodative kunye refraction nangeengcamba ukukhanya.