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.

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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, 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.