I mit pahnih ring dum (pupillary distance) inkar hlat zawng dik tak i hria em? Hei hi glasses vuah tan chuan a pawimawh hle!

Glasses vuah thiam i ni em? A nih loh leh pakhat hmuh i tum em? Chutiang a nih chuan vawiin hian i mit nena inmil tur glasses thlan huna thil pawimawh tak tak kan sawi dawn a ni. Hei hi tehna pakhat ‘Pupillary Distance’ tih a ni. He term hi i la hre ngai lo mai thei. Amaherawhchu, i mit hmuh fiah reng a pawimawh hle.

He ‘pupillary distance’ hi eng nge ni?

A awlsam zawngin, Pupillary Distance , a tawi zawngin PD tih hi i mitmeng lai tak (i ​​mit lai takah chuan circle dum) atanga i mit dang atanga i mitmeng lai tak inkar a ni. Hei hi millimeter (mm)-a teh a ni tlangpui. Mit lama mithiamte chuan hei hi Interpupillary Distance (ID) tiin an sawi fo thin.

Glasses prescription pek i nih hian he PD value hi a pawimawh hle. A chhan chu glasses lens te hi i mit hmaah chiah siamrem a ngai a ni. Chu chu vision chiang ber i hmuh hunah a ni. Online-a glasses i lei a nih chuan i mit exam atanga prescription nen hian he PD value hi i mamawh ngei ang.

Hei hi in lamah ka teh thei ang em? Engtin nge ka tih ang?

Ni e, i duh chuan in lamah i PD teh tum theih a ni. Mahse, tehna dik ber tur chuan mit enkawltu thiam tak hnena teh a tha ber . A chhan chu millimeter tlemtea inthlak danglamna tlemte pawh hian i mit hmuhna a nghawng thei a ni.

Mahse, nangmah ngeiin i enchhin duh chuan i mamawh chu millimeter (mm)-a chhinchhiah ruler leh mirror chauh a ni. Online-ah hian PD tehna atana siam bik ruler bik a awm a. Smartphone app thenkhat pawh he tehfung hi laknaah hian a pui thei che niin an sawi bawk. Amaherawhchu, a tehna dik takah hian inrintawkna nasa tak neih a harsa a, nangmah ngeiin i teh emaw, app hmanga teh emaw pawh nise.

Mahni tehna i duh chuan hetiang hian i teh ang:

Hei hi a harsa deuh thei a, chuvangin i dawhtheih a ngai a ni.

1. A hmasa berin darthlalang hmaah êng tha takah ding rawh. I hmai chu darthlalang atanga inches 18 vel a hlaah dah la.

2. Tunah chuan, ruler chu i hmai thlengin vawn la, chutiang chuan millimeter marking te chu i hmu thei ang. Ruler chu bang en ang maiin i chelh duh a, i mit hnuai lam chiah a ni.

3. I mit veilam kha khar rawh.

4. Tunah chuan i mit dinglam chauh en la, ruler-a zero (0) chhinchhiahna chu i mit dinglam circle dum lai takah chiah dah rawh. Black circle chu pahnih-a chiang taka then thei line awmin han ngaihtuah teh, chu line-ah chuan zero chu a awm tur a ni. Hetih lai hian ruler chu sawn suh, okay? I tih chuan i tan thar leh a ngai dawn a ni.

5. Awle, tunah chuan i mit veilam kha hawng la, i mit dinglam kha khar rawh.

6. Tunah chuan i mit veilam chauh en la, i mit veilam circle dum lai takah chiah millimeter mark chu zawng rawh. Tun hma ang bawkin, black circle chu pahnih-ah chiah a awm tih i ngaihtuah chuan, chu center hnaih ber millimeter mark chu i PD value a ni.

Hriat reng tur: Hetianga teh ringawt hi a harsa deuh a, tihsual a awm thei bawk. Chuvangin a theih chuan tanpuina zawng rawh.

Mi puihnain i teh chuan a awlsam zawk!

Miin a puih che chuan a awlsam zawk. A tih dan tur chu hetiang hi a ni:

1. I PD tehtu chu i hmaah a thu tur a ni a, i hmai inkarah inches 18 vel a awm tur a ni.

2. Ruler chu i hmai thlengin a chelh tur a ni a, chutiang chuan millimeter chhinchhiahna te chu a hmu thei ang. Ruler chu i mit hnuaiah (bang chung lam atanga i en ang maiin) awm tur a ni.

3. Tunah chuan i PD tehtu mit veilam chu en nghal rawh. Heta tang hian i lu kha sawn loh tum ang che.

4. A tehtu chuan ruler-ah zero (0) chhinchhiahna chu i mit dinglam ring dum pawn lam kil (chu chu an veilam atanga an hmuh theih i mit dinglam ring dum kil kil)-ah awm turin a dah tur a ni. Hetiang hunah hian ruler chu kal tir suh la, chuti lo chuan i tan thar leh a ngai dawn a ni.

5. Tunah chuan i PD tehtu mit dinglam chu en nghal rawh.

6. A tehtu chuan i mit veilam zungbun dum chhung lam kil hnaih ber (chu chu i mit veilam zungbun dum kil khat, an dinglam atanga an hmuh theih) hnaih ber chu en tur a ni. Chu millimeter mark chu i PD value a ni.

Engvangin nge he ‘pupillary distance’ (PD) hi a pawimawh em em?

Hetiang hian han ngaihtuah teh: i mitmenga mitmeng (pupils) te hi camera lens ang mai a ni. Chûngte hmang chuan êng a lut a ni. Tichuan, he êng hi mit chhunga lens kal tlangin mit hnung lama retina-ah a tla thla a ni. Chu chu kan hmu a ni.

Mahse, mit i hmuh that loh chuan he light hi a focus tha lo. Chuvangin distance thenkhat blurry kan hmu thin. Entirna tlemte chu hetiang hi a ni:

• Farsightedness/Hyperopia - hnai tak atangin chiang takin a hmu thei a, hla takah erawh a hmu thei lo.
• Nearsightedness/Myopia - Hmun hla tak atangin chiang takin a hmu thei a, mahse hnai tak atangin a hmu thei lo.
• Presbyopia - kum 40 hnu lama mi tam takin an vei thin.
• Astigmatism - Mit pianzia a inthlak avangin light a focus tha lo.

Glasses chungchang sawi dawn chuan mi zawng zawngin glasses chi khat an dawng vek dawn lo. A chhan chu thil tam takin i mit a nghawng vang a ni a, chu chu i mit lama harsatna nasat dan te, astigmatism degree i neih zat te hi a ni.

I PD dik taka teh a, i lens-te optical center chu i mitmeng lai takah a centered theih nan i siamrem chuan i lens atang hian hlawkna tam ber i hmu ang. Hei hian mit hmuhna chiang tak, nuam tak a pe ang che.

‘Nasopupillary Distance’ hi hetiang hi a ni em?

Ni e, PD bakah hian tehna pawimawh dang a awm a, chu chuNasopupillary atanga hlat zawng . Hei hi i mit dum lai tak atanga i hnar bridge lai tak thlenga hlat zawng a ni.

Ngaihtuah teh, mi panga zinga pali chuan mit leh hnar chu a inmil tawk lo. Chu chu mit pahnih tan `Nasopupillary Distance` a inang lo tihna a ni. A tam zawkah chuan he danglamna hi millimeter 2 (2mm) aia tlem a ni. Mahse, mi paruk zinga pakhat vel tan chuan he danglamna hi millimeter 2 (2mm) aia tam a ni thei. He hlat zawng hi a tlem avangin mi tam takin an hre lo emaw, an hre lo emaw pawh a ni thei. Mahse, hei hian glass design a nghawng thei bawk a, a bik takin multifocal lens te pawh a nghawng thei a ni.

‘Pupillary Distance’ (PD) tehna dik lo a nih chuan eng nge thleng ang?

I PD value tehna dik lo hmanga siam glasses i ha a nih chuan eng nge thleng ang tih han ngaihtuah teh. Hetiang hian hrehawmna i tawk tan mai thei:

• Mit tichhe thei
• Lu na
• I mit hmuh dan dik lo - thil dik lo emaw, tihdanglam emaw angin a lang

Heng symptoms te hi hlauhawm vak lo mahse, hrehawmna nasa tak a thlen thei che a ni. Tin, i mit a tul lo taka a tihbuai avangin i mit a chhe thei bawk. Chuvang chuan PD dik tak neih a pawimawh.

He ‘pupillary distance’ (PD) hi a hun hunah a danglam em?

I naupan lai chuan he PD hi i lo puitlin chuan a danglam thin. Chu chu, i naupan laia PD i neih leh i naupan laia i neih chu a inang lo tihna a ni. Mahse, he PD value hi puitling i nih hnuah pawh a danglam lo tlangpui.

Mahse, a danglam thei hi a tlem hle. Entirnan, i mit emaw i hmai emaw operation i neih a ngai a nih chuan chu surgery hnuah chuan i PD chu a danglam deuh thei a ni.

‘Pupillary distance’ (PD) chu engzat nge ni?

Puitling pakhat tan chuan PD value chu millimeter 63 `(63mm)` vel a ni. Mahse, hei hi mi hrang hrangah a inang lo. Puitling tam zawk chuan PD value 50 leh 70 millimeter `(50mm - 70mm)` inkar an nei a. Mi tlemte PD value hi he range pawnah hian a danglam thei. Mi thenkhat chuan 45 millimeter `(45mm)` tluk zetin hlutna an nei thei a, thenkhat erawh chuan 80 millimeter `(80mm)` tluk zeta sang an nei thei thung.

Eng dinhmunah nge mahni rorelnaah kan innghah loh ang?

I glasses hi thil pakhat atan chauh i hmang a nih chuan (entir nan, lehkha chhiar emaw, light work emaw) chutiang atan chuan i PD chu a tha tur a ni. Mahse, thil engemaw takah chuan i PD hi dik taka teh a ngai thin . Hengte hi a ni:

• Multifocal lens i mamawh chuan: Hengte hi `progressive lens`, `bifocals` (hla leh hnai zawng zawng hmu thei lens), emaw `trifocals` (hlat zawng pathum, inkar hlat zawng, leh hnai zawng zawng hmu thei lens) te an ni. Heng lens te hi a part tin hi dik taka siam tur chuan PD value hi dik takin i hriat a ngai a ni.
• Hmun hnai leh hla taka hmuh theihna tur glasses vuah chhunzawm zel i mamawh a nih chuan:A chhan chu, kan hmaa thil kan en hian kan PD hi a tawi deuh deuh a, millimeter 3 (3mm) vel a ni.
• I mit iris (strabismus ang chi) inmil lo (mislignment) i neih chuan: Chutiang hunah chuan i PD chu specialist-in a teh a pawimawh hle.

Hetiang dinhmunah hian i PD hi nangmah teh ai chuan mit lam doctor emaw, mit enkawltu trained emaw hnenah teh tir a tha ber.

Engvangin nge he PD hi ka glasses prescription-ah hian a sawi loh?

Hei hi mi tam takin harsatna an neih a ni. Ram thenkhatah (entir nan, United States-ah) glasses prescription pek hunah PD value tarlan tur dan a awm lo. Mahse, state thenkhatah chuan chutiang dan chu an nei ve tho. Sri Lanka ramah chuan a tlangpuiin i mit lam doctor emaw glasses siamtu emaw chuan he PD value hi a teh ang a, an hnenah a dah ang.

I dil chuan PD value an pe thei che a ni. Amaherawhchu, hmun thenkhatah chuan a man hran an chawi thei a ni. Mahse, i fit tawk tur glasses pahnih i hmuh theih nan chuan he PD value hi dik taka teh a pawimawh hle. Chuvang chuan hemi chungchang hi mit doctor emaw, mittui tlakna dawr emaw zawhfiah a tha.

Chuvangin, hetah hian take-home message te chu a awm:

Okay, chuvangin kan sawi tawh atanga i hriat reng tur thenkhat chu hetiang hi a ni:

• Pupillary Distance (PD) chu i mit ring dum inkar hlat zawng a ni.
• He PD value hi glasses siam nan a pawimawh hle a, chu chuan mit chiang leh nuam tak a pe thei che a ni .
• Hei hi in lamah teh i tum thei a, mahse , tehna dik ber tur chuan mit enkawltu professional hnenah teh tir a tha ber.
• PD tehna dik lo a nih chuan mit natna, lu na, mit hmuh lohna , leh i mit hmuhna pawh a chhe thei bawk.
• PD value dik tak hi a pawimawh hle a, a bik takin multifocal lens i hman emaw, strabismus ang chi condition i neih emaw chuan.

Chuvangin, i glasses siam that tura i kal leh hunah chuan he PD value hi tlem tal ngaihven rawh. A chhan chu millimeter khat emaw pahnih emaw inthlauhna tlemte pawh hian i mit hmuhnaah nghawng lian tak a nei thei a ni! Mit hrisel pahnih hi nunah hlutna ropui tak a ni.

` Pupillary distance, glasses, mit endikna, mit hmuhna, mit hriselna, PD tehna, interpupillary distance