Hmun hnai taka hmuh a har em? I distance vision kha vawng reng i duh em? 'Monovision' chungchang hi han sawi ila!

Kum 40 i tlin hnuah, i phone-a chanchinbu emaw, message emaw chhiar chu i tan a harsa deuh tawh em? Letter-te chu a hlimthla ang maia a lan avangin i kut chu tlem i sawn a ngai tawh em? Hei hi mi tam tak chunga thil thleng a ni. Mahse near vision atana glasses i bun hian hla tak i hmuh hunah i phelh a ngai a ni. Heng glasses thlak hi mi thenkhat tan chuan harsatna tak tak a ni. Chuti a nih chuan, he thila solution tha tak anga lo kal technology ‘Monovision’ tih hi i hre tawh em? Vawiin hian awlsam takin sawi ila.

A awlsam zawngin, monovision chu eng nge ni?

A awlsam khawp mai. Monovision hi i mit chu i hnaih ber thil (e.g., lehkhabu chhiar, i phone en) leh i mit dang chu thil hla tak tak (e.g., lirthei khalh, TV en) ngaihtuah turin zirtirna a ni I mit chu hna hrang hrang pahnih pek ang mai a ni.

Hetiang hian han ngaihtuah teh. I mit pakhat hian hnai taka hmuh a thiam hle a, mit pakhat zawk hian hla tak a hmu thei bawk. I thluak chuan engtin emaw takin heng mit pahnih atanga thlalak te hi a inzawm khawm a, a hnai leh hla tak pawh chiang taka hmuh theihna tur thlalak kimchang tak a siam a ni. Mi thenkhat chuan hei hi ‘blended vision’ an ti thin. Hei hian near vision atana glasses mamawhna chu i paih chhuak vek tawh mai thei tihna a ni.

Engvangin nge hetiang thil hi kan mamawh?

Kan tar vek a, a tlangpuiin kum 40 kan tlin hnuah, hnai taka thil hmuh a harsa zual thin. Chanchinbu chhiar laiin kum upa zawkte mitmeng an tichhe tih i hmu tawh ngei ang. Damdawi lamah chuan he natna hi ‘presbyopia’ kan ti thin.

Hei hi a chhan chu kan mit chhunga lens flexibility hi kum upat deuh deuhin a tlahniam vang a ni. Mit chhunga taksa peng te (`ciliary muscles`) te hian he lens hi a tul angin an ben thei lo va, thil hnai tak takah an focus thei lo. Hei hi ‘Accommodation reflex’ an ti a, chu chu a chak lo hle.

Monovision hian he chak lohna hi a bypass a ni. Tin, mit pakhata cataract surgery nei te hian a chang chuan he monovision system hmang hian lens an dah thei bawk.

Monovision neih theihna tur kawngte chu engte nge ni?

He monovision hi i tihhlawhtlin theih dan kawng hrang hrang a awm. Ṭhenkhat chu hun eng emaw chen atan a ni a, ṭhenkhat chu a awm reng a ni.

• Contact Lens: Hei hi monovision hi i tan a tha em tih hriatna tha ber leh him ber a ni. I doctor chuan mit pakhatah near-vision lens a dah ang a, mit dangah distance-vision lens chu rei vak lo a dah ang. Hei hi i hman thiam theih leh theih loh leh hrehawmna i neih leh neih loh en hun tha tak a ni.
• Laser Vision Correction: Hetiang method hi contact lens hmanga hlawhtling tih i hmuh chuan LASIK emaw PRK emaw hi a awm reng thei.Hetiang hian laser surgery i nei thei bawk. Hei hian mit mit (cornea) pianzia a thlak danglam a, permanent monovision a pe bawk.
• Intraocular Lens Surgery: Cataract surgery neih lai hian mit chhunga artificial lens dah chu monovision atan siamrem theih a ni.

Hetiang hmanrua hi eng nge a thatna leh a that lohna?

Damdawi dang ang bawkin monovision hian a thatna leh a that lohna a nei vek a ni. Eng nge an nih i han thlir teh ang.

He ‘Pulfrich Effect’ hlauhawm tak hi eng nge ni?

Hei hi fimkhur tur thil a ni. A awlsam zawngin sawi ila, i mit atanga i thluak thlenga thlalak kal dan chiang tak chu a danglam avangin, i thluak in thlalak pahnih a process hun chhung hi a danglam deuh hlek a ni. Mit pakhat atanga thlalak lo chhuak chu mit dang aiin second tlemte chauhvin i thluak ah a thleng a ni.

He inthlauhna tenau tak hian thil kal lai a hlat zawng, a tlan chak dan leh a kalna tur dik taka hriatthiam theih loh a siam a ni.

Car i khalh lai han mitthla teh. I hmaa kawngpui zawhtu lirthei emaw, mi emaw inkar hlat zawng dik taka i chhut thiam loh chuan engtiang chiahin nge a hlauhawm ang? He effect hi a bik takin speed sang leh light hniam taka lirthei khalh hian a langsar thei hle .

Monovision hmanga khawsak huna ngaihtuah tur thil

Monovision i hman thiam tawh chuan i mit hriselna enkawl a pawimawh hle.

• Mit enfiah fo rawh: Kum khatah vawi khat emaw vawi hnih emaw tal i mit enfiah tir la, i mit doctor-in a rawt angin. Damdawi lam harsatna dang, zunthlum -a i neih chuan, i enfiah fo a ngai mai thei.
• Glasses bik: I doctor chuan zan lama lirthei khalh nan emaw, computer-a hnathawh ang chi hna nalh tak tak emaw atan chauh hman tur glasses bik a pe thei che a ni. Hei hian heng dinhmun hlauhawm tak karah hian vision tha ber i nei thei ang.

Monovision hi mi tam takin mitdelna nei tam takin glasses an tihbo theih nan a pui hle. Mahse, mi zawng zawng tan a ni lo. I hman thiam theih leh theih loh leh side effect a neih leh neih loh chu mi hrang hrangah a inang lo.