< img height="1" width="1" style="display:none" src="https://www.facebook.com/tr?id=1028840145004768&ev=PageView&noscript=1" /> Litaba - Tsebo ea mantlha ea likhalase tsa ho bala tseo u hlokang ho li tseba

Tsebo ea motheo ea likhalase tsa ho bala tseo u lokelang ho li tseba

Likhalase tsa ho bala ke mofuta oa likhalase tsa optical, tse fanang ka likhalase tsa myopia tse atisang ho sebelisoa ke batho ba nang le presbyopia, tseo e leng tsa lense ea convex. Likhalase tsa ho bala li sebelisoa ho tlatsa mahlo a batho ba lilemong tse bohareng le ba hōlileng. Joalo ka likhalase tsa myopia, li na le litekanyetso tse ngata tsa elektroniki tsa optical index tse hlokoang ke maemo a indasteri ea naha, hape li na le maemo a ikhethileng a ts'ebeliso. Ka hona, likhalase tsa ho bala li tlameha ho ba le likhalase.

Ntlha ea pele, lihlopha tsa motheo tsa likhalase tsa ho bala

Hajoale, ho na le mefuta e meraro ea bohlokoa ea likhalase tsa ho bala 'marakeng, e leng lense ea pono e le' ngoe, lense ea bifocal le lense ea asymptotic multifocal.

Lense ea pono e le 'ngoe e ka sebelisoa feela ho bona haufi, 'me pono e tlameha ho tsosolosoa ha u shebile hōle. E loketse feela batho ba nang le presbyopia e bonolo le maqhubu a tlaase a ho sebelisa likhalase tsa ho bala;

Li-bifocals li bua ka likhalase tsa ho bala tse nang le lense e kaholimo ea pono e sebelisoang ho bona hole, le lense e ka tlase ea halofo e bonoang haufi, empa likhalase tse joalo tsa ho bala li tla ba le pono e lerootho le ho tlokoma, 'me ho apara nako e telele ho tloaelehile haholo ho ba le bohloko ba mahlo, ho tsekela. , joalo-joalo, moralo oa malapeng ha o motle, 'me ha o tloaelehe hona joale; lense ea asymptotic multifocal e ka fihlela litlhoko tsa pono e lerootho libakeng tse fapaneng hole, bohareng le haufi. Ponahalo ke ea theknoloji e phahameng le ea feshene, 'me e loketse haholo bakeng sa myopia ea kajeno ho feta lilemo tse 40. Leihlo le li-presbyopia, liaparo tsa sehlopha sa astigmatism.

Ea bobeli, maemo a kopo ea likhalase tsa ho bala

Presbyopia ke ntho e tloaelehileng ea 'mele, eseng lefu la mahlo, leha e le hore ke motho ea tsofetseng feela. Ka mor'a lilemo tse 40, ka ho thatafala butle-butle ha likhoele tsa lik'hemik'hale tsa lense ea leihlo le ho tsieleha butle-butle ha 'mele oa ciliary, leihlo la motho le sitoa ho fetola ponahalo ea ponahalo (radial transformation) ka mokhoa o utloahalang. Ho itšetlehile ka sebaka se pakeng tsa lintho, u tlameha ho suthela hōle ha u sheba lintho tse haufi pele u ka bona hantle. Boemo ba mahlo ka bobeli ka nako ena bo bitsoa presbyopia.

Haeba presbyopia e batla ho sebelisa pono ea mahlo sebakeng sa pele sa tloaelo, hoa hlokahala ho roala likhalase tsa ho bala ho tlatsa pono ea mahlo, e le hore pono e haufi e ka boela ea bonoa ka ho hlaka. Mahlo a mabeli. Tekanyo ea myopia ho presbyopia e amana le lilemo. Ka ho eketseha ha lilemo, ho senyeha ha lense ea mahlo ho tla eketseha, 'me tekanyo ea myopia e tla eketseha butle-butle.

Presbyopia e se e etsahetse, 'me haeba u tsitlella hore u se ke ua apara likhalase tsa ho bala,' mele oa ciliary o tla khathala 'me o sitoa ho ikamahanya le maemo, e leng ho tla mpefatsa bothata ba ho bala, ho baka ho tsekela, ho tsekela le mafu a mang a mangata, a tla beha bophelo ba letsatsi le letsatsi kotsing. sebetsa. Boitlhompho bo phahameng. Ka hona, likhalase tsa presbyopia li lokela ho kopanngoa hang-hang ntle le tieho (Batho ba Machaena ba na le maikutlo a fosahetseng: ba nahana hore ho roala likhalase tsa ho bala ke "lefu" le tebileng, 'me ha ba hlokomele boteng ba likhalase tsa ho bala. Ena ke maikutlo a fosahetseng).

Ka mor'a ho tsofala, likhalase tsa ho bala tse neng li e-na le myopia e sa lekaneng li lokela ho nkeloa sebaka hang-hang. Ka hona, likhalase tsa ho bala ha lia lokela ho apesoa ka linako tsohle. Ho apara ka nako e telele likhalase tsa ho bala ka tekanyo e sa lokelang ea myopia ho ke ke ha baka mathata a mangata bophelong ba letsatsi le leng le le leng, empa hape ho tsoela pele ho potlakisa ts'ebetso ea li-binocular presbyopia.

Tlas'a maemo a tloaelehileng, ho na le lipontšo tse peli tse ka sehloohong tsa presbyopia nakong ea pele:

Ea pele ke mosebetsi o haufi kapa ho bala ka thata. Ka mohlala, ha u bala, u lokela ho tšoarela buka hōle, kapa u tlameha ho e bala sebakeng se nang le mehloli e matla ea khanya e le hore u e hlokomele.

Ea bobeli ke mokhathala oa mahlo. Ka phokotso ea matla a bolulo, litlhoko tsa ho bala butle-butle li atamela moeli oa matla a bolulo, ke hore, ha u bala, ha e le hantle matla ohle a bolulo a mahlo a mabeli a tlameha ho sebelisoa, e le hore ho se ke ha khoneha ho sebelisa mahlo nako e telele, le ho bonolo haholo ho baka ho ruruha ha mahlo ka lebaka la phetoho e feteletseng. , hlooho le matšoao a mang a mokhathala oa pono.

Ho hlaha ha maemo a mabeli a ka holimo ho bontša hore mahlo a ka 'na a tsofala butle-butle. Bakeng sa lihlopha tsa myopic, hoa hlokahala ho tlosa likhalase tsa myopic kapa ho lokisa buka ea ho bala hole ha u bala haufi, e leng pontšo e ka sehloohong ea presbyopia. Ka mor'a hore mahlo a mabeli a be le presbyopic, tsela e sireletsehileng ka ho fetisisa ke ho roala likhalase tse loketseng tsa ho bala bakeng sa ho lekanya.


Nako ea poso: Aug-09-2022