I mitmeng dum (black pupil) chungchang hi heng thilte hi i hria em?

Darthlalangah i mit i en ngai em? I en chuan mit rawng hrang hrang (hei hi iris kan ti) laiah hian hmun dum te tak te i hmu a. Chu chu zirlai kan tih chu a ni . Hei hi black spot mai a ni lo. Kan mit hmuhna chungchang thu pawimawh tak tak sawina hmun mak tak a ni a, chubakah kan taksa hriselna chungchang pawh a sawi bawk. Chuvangin vawiin hian he black spot hi awlsam takin kan sawi dawn a ni.

He black magic hi eng nge ni tak tak? Eng nge a tih?

A awlsam zawngin, i mit chhunga black hole chu mit luhna a ni a, camera-a aperture ang mai a ni. A takah chuan a dum lo, mit chhunga inhawng thei hmun ruak mai a ni.

I mit rawng nei, iris-a taksa ruh (muscles) te hian he ring dum hi engzat nge a lian leh te tih hi a thunun a ni.

• Ni êng chak tak awmna hmuna i kal chuan mit chhungah êng a lut tam lutuk. Tichuan iris chhunga muscle te chuan black ring chu an activate a, an constrict ta a ni . Hei hian mit chhunga êng lut zat a tikhawtlai a ni.
• Pindan thim takah i luh chuan i mit thlengin êng a thleng tawk lo. Iris chhunga muscle te hian black ring chu a tizau a , a theih ang anga light a luh tir a, chiang takin i hmu thei bawk.

Hetianga êng chhanna atana mitmeng ( pupil dilating ) hi pupillary light response an ti a . Hei hi kan vision fiah taka vawn reng nan a pawimawh hle.

Engvangin nge engvangin nge rei lo te chhung chu engmah i hmu thei lo tih han ngaihtuah teh, ni êng tak atanga i rawn luh thut chuan. Thil thleng chu i mit dum, êng êng takah chuan a lo tlêm tawh a, thim i luh leh hunah chuan a lo ṭhang leh theih nan hun engemaw chen a la ngai a ni.

Eng a luh tir mai ni lovin, he ring dum hmang hian aqueous humor , mit chawmtu tui chu mit hma lam panin a kal a ni.

Engvangin nge he rul dum hi a dum hmel?

Hei hi hmun ruak tak a nih chuan engvangin nge dum hi kan hmuh? A chhan chu mit chhunga êng lut chu a tlangpuiin a chhuak leh tawh lo. Chu êng chu mit chhunga retina chuan a hip lut a ni. Pindan thim takah window atanga thlir a, a chhung lam chu dum anga hmuh ang mai a ni.

Mahse, thlalak i lak hian, a bik takin flash on laiin i mit a sen vek tih i hre tawh em? ‘Red-eye effect’ an ti a ni. Thil thleng chu camera flash atanga êng êng tak chu mit chhungah a lut nghal a, mit hnung lama thisen kalna kawngte chuan a rawn let leh ta a ni. Chutah chuan mit chhungah rawng kan hmu thin.

Eng natna nge black grouse hi a nghawng?

A chang chuan mit dum lian leh te inthlak danglamna hi a takin harsatna a ni thei. Mahse a tam zawkah chuan taksaa damdawi lam dinhmun dang chhinchhiahna a ni thei. Chuvang chuan doctor-te chuan mi lu hliam an enfiah hian mit dum an en hmasa ber a ni.

Black grouse nghawngtu dinhmun lian ber berte hi han en ila.

Heng bakah hian mit dum (cataract) leh cluster headache chi hrang hrang ang chi thilte hian mit dum hnathawh leh a lian zawng a nghawng thei bawk.

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Engtin nge doctor hian heng natna te hi a enfiah thin?

Engtin nge doctor chuan i lei dumah thil danglam tak a hmuh theih ang tih i ngaihtuah mai thei. Chu chu hriat tumin test eng emaw zat an tlan thei a ni.

• Comprehensive eye exam: Hetah hian doctor chuan flashlight te tak te hmangin i mit pahnih chu a inthlak a, retina pahnih hian a chhanna a inang tlangin a dik em tih a en a.
• Special medicated eye drops hman: A châng chuan mit dum tizau emaw, tichhe thei emaw eye drop hman a ni a, mit dum chuan a chhang let a, a harsatna chu eng nge a nih tih hriat tumin a chhang let ṭhin.
• Thil dang test: Mit dum lama harsatna hi mit lama harsatna mai a ni lo. Taksa hmun danga natna khirh tak chhinchhiahna a ni thei a, thluak pawh a ni mai thei. I doctor chuan a chhan hriat tumin thisen test emaw, CT scan emaw, MRI scan emaw a ti thei ang.

A pawimawh ber chu i black circle lian tham tak a inthlak tih i hriat chuan emaw, i mit hmuh danah inthlak danglamna i hmuh chuan doctor lam pan nghal tur a ni.

Kan mit hrisel reng turin eng nge kan tih theih ang?

Okay, chuti a nih chuan kan mit, kan mit dum pawh tiamin, hrisel taka awm theih nan eng nge kan tih theih ang? Heng thil tenawm tak takte hi tih danah i siam chuan i mit a chak hle ang.

• Meizial zuk pumpelh: Meizial zu mi i nih chuan bânsan tum hi i mit tana i tih theih lian ber pakhat a ni. Meizial zuk hi natna tam tak nen a inzawm tlat a, chu chu mitdel leh mit (retinal damage) te hi a ni.
• Ei leh in tha tak nei rawh: I eitur ah hian thlai hring leh hnah hring (spinach leh kale ang chi), omega-3 fish salmon, tuna, leh mackerel, walnuts, leh flax chi te telh bawk ang che. Tin, tui tam tak in tur a ni.
• Exercise: Ni khatah minute 30 tal exercise la, kar khatah ni 5 chhung exercise la. Diabetes Mellitus ang natna nei te hian mit lamah harsatna an nei tam zawk. Exercise hian chu hlauhawmna chu a tiziaawm thei a ni.
• Safety glasses vuah: Ni chhuahna hmuna chhuah dawnin UV rays laka invenna sunglass vuah tur a ni. Tin, thir hna i thawh emaw, thing hna i thawk emaw, infiamna emaw i tih chuan, safety glasses vuah hian mit hliam awm thei chu a veng thei bawk.
• Contact lens hman hunah fimkhur rawh: Contact lens i bun chuan i kut i dah hmain sahbawn leh tuiin uluk takin sil hmasa phawt ang che. Doctor-in a tihfai dan tur leh eng chen nge i hak tur tih chu zawm rawh.
• I mit kha chawlh tir rawh (20-20-20 rule): I computer emaw phone emaw en hian hun tam tak i hmang a nih chuan minute 20 danah feet 20 vela hla thil pakhat second 20 chhung en thin ang che. Hei hi 20-20-20 rule an ti a. Hei hian mit natna nasa takin a ti tlem a ni.
• I mit enfiah fo rawh: Harsatna i nei lo a nih pawhin doctor-in a rawt angin i mit enfiah fo ang che. Glaucoma emaw diabetes ang chi condition i neih chuan checkup reng reng a pawimawh.