Progressive lens yekuona pamusoro pe40
Mushure memakore makumi mana, hapana anofarira kushambadza zera ravo - kunyanya kana iwe uchinge watanga kunetseka nekuverenga zvakadhindwa.

Nechemumoyo, mazuva ano magirazi emaziso ari kufambira mberi anoita kuti zvisakwanisike kuti vamwe vataure kuti wasvika pa“bifocal age”.

Malenzi anofambira mberi - dzimwe nguva anonzi "no-line bifocals" - anokupa kutaridzika kwehudiki nekubvisa mitsetse inooneka inowanikwa mune bifocal (uye trifocal) lenzi.

Zvakanakira kufambira mberi lenses pamusoro bifocals
Bifocal eyeglass lenzi ane masimba maviri chete: rimwe rekuona mhiri kwekamuri uye rimwe rekuona padhuze.Zvinhu zviri pakati, sesekirini yekombuta kana zvinhu zviri pasherufu yegirosari, kazhinji zvinoramba zvisina kujeka nema bifocals.

Kuti uedze kuona zvinhu zviri pairi “pakati” renji zvakajeka, vanopfeka bifocal vanofanirwa kukwenya misoro yavo kumusoro nekudzika, vachitarisa nepamusoro uyezve pasi pemabifocals avo, kuti vaone kuti ndeipi chikamu chelenzi chinoshanda zvirinani.

Malenzi anofambira mberi anonyatso kutevedzera chiono chechisikigo chawaifarira chisati chatanga presbyopia.Panzvimbo pekungopa masimba maviri emalenzi senge bifocals (kana matatu, senge trifocals), malenzi anofambira mberi ndeechokwadi "multifocal" lenzi anopa kufambira mberi kwakatsetseka, kusina musono kwemasimba mazhinji emalenzi ekuona kwakajeka mukamuri, padhuze nepamafaro ese ari pakati.

Nemalenzi anofambira mberi, hapana chikonzero chekukwenya musoro wako kumusoro nekudzika kana kutora zvimiro zvisina kugadzikana kuti uone komputa yako skrini kana zvimwe zvinhu pakureba kweruoko.

Kuona kwakasikwa pasina "mufananidzo kusvetuka"
Mitsetse inooneka mune bifocals uye trifocals inzvimbo uko kune kamwe kamwe shanduko yesimba re lens.

Kana mutsara wekuona we bifocal kana trifocal wemupfeki ukafamba nemumitsetse iyi, mifananidzo inoerekana yatama, kana kuti “svetuka”.Kusagadzikana kunokonzerwa neiyi "mufananidzo kusvetuka" kunogona kubva pakugumbuka zvinyoro kusvika pakugadzira kusvotwa.

Malenzi anofambira mberi ane kutsetseka, kusina musono kufambira mberi kwemasimba ekuona kwakajeka pamadaro ese.Malenzi anofambira mberi anopa kudzika kwakawanda kwekutarisa pasina "kusvetuka kwemufananidzo."

Malenzi anofambira mberi ave anonyanya kufarirwa multifocal lenses kune chero munhu ane presbyopia anopfeka magirazi emaziso, nekuda kwekuona kwavo uye zvekushongedza zvakanakira pamusoro pebifocals uye trifocals.