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 putlama, '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 apara 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