Mit hmuh dan hi i zir belh ang u. 20/20 Vision chu eng nge ni?

Mit enfiah tura i kal laiin mit lam doctor emaw mit doctor emaw, "I mit chu 20/20 a ni" a tih i hre ngai em? A nih loh leh i ṭhian pakhatin a sawi i hre tawh mai thei. Mi tam tak chuan 20/20 vision hi a famkim, a famkim a, a famkim niin an ngai. Mahse, chutiang chu a ni tak tak em? "20/20" myth hi eng nge a nih chiang takin i zawng chhuak ang u.

20/20 Vision chu eng nge ni?

A awlsam zawngin, 20/20 vision hi "normal" vision a ni. Feet 20 vela hlaa thil pakhat chiang leh hrual taka i hmuh theih dan a teh a ni. Mit lama mithiamte chuan hei hi visual acuity an ti a.

Ngaihtuah teh, mit enfiah tura i kal hian chart-a letter awmte chu an en tir che a ni. Chart atanga feet 20 vela hlaah i awm a ni.

• Number hmasa ber (20): Hei hian letter awmna chart atanga i hlat zia a hrilh che a ni. Mit test-ah chuan hei hi 20 a ni fo a, a chhan chu standard distance chu feet 20 a nih vang a ni.
• Number pahnihna (a lehlamah 20): Hei hian mit hmuhna pangngai nei chuan feet 20 atanga i hmuh ang chiah hian thil pakhat chu feet engzat nge a hlaah a hmu ang tih a hrilh che a ni.

Chu chu, 20/20 vision i neih chuan, feet 20 atanga i hmuh chu, mit pangngai nei chuan feet 20 atanga i hmuh ang chiah hian a hmu thei tihna a ni. Hei hi "normal" vision a ni a, "perfect" vision a ni lo. Mak tak maiin khawvel mihring 35% vel chauh hian 20/20 vision an nei a, glasses vuah emaw, contact lens vuah emaw, mit surgery nei tawh emaw pawh nise.

Tunah chuan en teh, a chang chuan i vision chu 20/15 anga list a ni thei. Chumi awmzia chu feet 20 atanga i hmuh theih thil chu mitdelna pangngai nei mi pakhatin chiang taka a hmuh theih nan feet 15 a hlaah a awm a ngai dawn tihna a ni. Chu chu i vision chu average aiin a tha zawk tihna a ni!

Tin, i mit chu 20/40 a nih chuan feet 20 atanga i hmuh theih thil chu feet 40 atanga mit pangngai nei mi pakhatin chiang takin a hmu thei tihna a ni. Chumi awmzia chu i mit chu a tlangpui aia tlem a ni tihna a ni a, a chhan chu chiang taka hmuh theih nan mi pangngai aiin a hnaih zawk a ngai a ni. Mahse, lungngai suh, i mit hmuh chu 20/20 aia tlem a nih chuan, a thianghlim theihna tur kawng tam tak a awm.

Kan ram hian feet-a hlat zawng a teh ang bawkin khawvel ram thenkhatah chuan metric system hi an hmang a ni. Chu ramah chuan 20/20 vision hi 6/6 vision an ti a. Chu chu feet 20 ni lovin metre 6 vela hlaa thil awm chiang taka i hmuh theih leh theih loh an teh tihna a ni.

Mit hmuh danah hian 20/20 vision chauh hi a pawimawh em?

Khawvel chiang taka hmuh theih nan 20/20 vision neih a pawimawh laiin, mit hmuhna lama thil pawimawh dang a awm bawk. Anni chu:

• Color vision: Rangkachang dik taka hriat theihna.
• Mit alignment: Hei hi depth perception leh 3D vision atan a pawimawh hle. Mit pahnih hi mumal taka thawhho a ngai a ni.
• Low-light emaw night vision: Thim zinga hmuh theihna degree.
• Peripheral vision: Lu hawi lovin a sir lam atanga hmuh theih range of vision.

Chuvangin, i hrethiam em? 20/20 hi vision lam hawi pakhat chauh a ni. Heng zawng zawng hian mit hmuhna zawng zawngah a pui a ni.

Engvangin nge mit tha neih hi a pawimawh em em?

I himna atan mit tha neih a pawimawh hle. Ngaihtuah teh, kawngpuiah car hmuh te, stairs atanga chhuk dawna step khat pawh hloh loh te, heng zawng zawng hian mit hmuhna tha a mamawh vek a ni.

Tin, nunphung sang tak neih theih nan mit hmuhna tha hi a pawimawh hle bawk . I vision hian i hnathawh, khawtlang nun, i hobby, lehkhabu chhiar, heng zawng zawng hi a nghawng a ni. Mit tha tak chu glasses emaw contact lens emaw i vuah tihna a ni thei. A pawimawh ber chu i chhehvel leh i chhehvela mite nena inpawh thei tur khawpa chiang taka i hmuh hi a ni – siamthatna awm emaw, siamthat loh emaw pawh nise.

Mit hmuhna tha chu corner hrual (sharp corner) pumpelh mai aia tam a ni. It also helps keep your mind sharp , nitin hna thawk turin chakna a pe che a ni. Chaw siam laiin recipe chhiar te, damdawi bottle-a instruction chhiar te, cleaning solution-a vaukhânna chhiar te, leh lirthei khalh laiin kawngpui chhinchhiahna leh bus route number hmuh te hian mit hmuhna ṭha tak a mamawh vek a ni.

Engtin nge 20/20 vision i nei tih i hriat theih ang?

Mit lam doctor chuan mit enfiahna hmangin i mit a test ang. A tlangpuiin kawng hrang hrang an hmang ang a, a bulpui berte chu:

• Visual acuity test: Hei hi a hmaa ka sawi tawh kha a ni a, chart-a letter chhiar tur a ni. He chart hi Snellen chart an ti a . A châng chuan letter aiah chart, shape nei te pawh hman a ni a, a bik takin naupang tê tête tan chuan.
• Retinoscopy: Hei hian i mit chhunga lens hrang hrang chelh a, eng lens nge chiang taka hmuh theihna tur tih hriat a ni. Doctor chuan i mit chhungah êng a rawn chhuah laiin hetiang hian a ti thin.
• Autorefraction: Hei hian machine (field chhunga in lem emaw, kawngpui thui tawp lama boruak lum balloon emaw) en a huam a ni. Machine hian i mit hmuh chu a teh nghal vek a ni. Doctor chuan heng chhiarnate hi i mit hmuh dan a zirchiang lehzual a, i tan glasses zat dik tak a pe bawk.

20/20 vision ka neih loh chhan te chu engte nge ni?

Mit 20/20 aia tlem lo awm chhan langsar ber chu refractive errors a ni. Hengte hi i mit pianzia inthlak danglamna a ni a, chu chuan mit a ti fiah lo. Chung zingah chuan:

• Hyperopia emaw Farsightedness: A bul hnaia thil awmte chu a hlimthla ang maia lang a, a chang chuan thil hla tak takte pawh a fiah deuh deuh bawk.
• Myopia or Nearsightedness: Thil hla tak tak te chu a fiah lo va, thil hnai tak tak te chu chiang taka hmuh theih a ni.
• Presbyopia: Hei hi tar ruala lo awm thin a ni. Lehkhabu leh chanchinbu ang chi thil hnai taka chhiar a harsat phah a ni. Kum 40 hnuah a intan tlangpui.
• Astigmatism: Hetiang dinhmunah hian mit hi a zungpui (spherical) famkim a nih loh avangin mit chhunga hmun khatah light rays a focus lo. Chuvângin, thil hnai leh hla tak takte chu a chhe deuhin a lang thei a, a fiah lo thei bawk.

Heng refractive errors bakah hian mit natna dang pawhin i mit a tichhe thei bawk. Entirna thenkhat chu:

• Cataracts: Mit lens atanga chhum (close) a awm.
• Corneal diseases: Mit hmalam a transparent membrane, mitmeng (cornea)-a natna lo awm.
• Diabetes-related retinopathy: Zunthlum vanga mit hnung lama retina chhiatna.
• Glaucoma: Mit chhunga pressure sang vanga optic nerve a chhiat.
• Retinal diseases: Mit retina-a awm natna chi hrang hrang.
• Strabismus , entirnan , amblyopia/lazy eye ang chi dinhmun.

Tin, average aiin vision tha zawk neih theih a ni a, mahse a tlem zawk.

Engtin nge mit hmuhna hniam hi enkawl a nih?

Refractive error i neih chuan i mit hmuhna siamthatna tur treatment tam tak a awm a. Heng enkawlnate hian i mit hmuhna chu a theih ang anga 20/20 hnaih tir a tum a ni. Chung zingah chuan:

• Eyeglasses: Hei hi hmanraw hman tlanglawn ber leh awlsam ber a ni.
• Contact lens: Glasses duh lo tan chuan a danglamna tha tak a ni.
• Vision correction surgery: Laser surgery ang chi thilte hian mit hmuhna chu a titha reng thei a ni.

Mit natna dang i neih chuan operation emaw damdawi lam enkawlna emaw a ngai mai thei. Tin, glasses emaw contact lens emaw i bun a ngai mai thei bawk. Chuti chung pawh chuan a chang chuan 20/20 vision i tihlawhtling lo mai thei a, mahse i nunpui theihna tur vision nuam tak i la nei thei tho.

Ka mit hmuhna (visual acuity) 20/20 hnuai lam a tlak theihna tur chu ka tihtlem thei ang em?

Ni e, a dik tak zet. Mit hrisel taka awm theihna tur leh mit lama harsatna i neih theihna tur tihziaawmna tur thil tam tak a awm a. Chung zingah chuan:

• Mit enfiah fo rawh: Kum khatah vawi khat tal emaw, kum hnih danah emaw i mit enfiah thin ang che. Hei hi glasses i bun loh pawhin a pawimawh hle.
• Mit venna vuah tur:Thil hlauhawm tak tak hmanga hnathawh hunah safety glasses vuah tur a ni. Tin, ni chhuahna hmuna chhuah dawnin sunglass vuah bawk ang che. Hei hian i mit chu ultraviolet rays hlauhawm tak lakah a venghim ang .
• Zuk leh hmuam emaw, nicotine emaw i hman chuan, i hman tawh loh nan doctor thurawn zawng rawh . Meizial zuk hian mit a tichhe nasa hle.
• Ei leh in dik tak ei rawh: I mit hian a hnathawh that theih nan vitamin leh mineral engemaw zat a mamawh a ni. I eitur ah hian leafy greens, yellow fruits, leh vegetables ang chi te telh bawk ang che.
• I taksa rihna hrisel tak vawng reng rawh. Thau lutuk hian zunthlum ang chi natna a thlen thei a, chu chuan i mit a tichhe thei bawk.
• Kut sil fo tur: Hei hian natna hrik leh natna hrik i mit a luh loh nan a veng thei a ni.
• Contact lens i bun chuan fai taka vawn dan tur thupek zawm la, a hun takah thlak leh rawh.
• Mit chhinchhiahna emaw, mit hmuh dan inthlak danglam emaw chu ngaihthah suh, a bik takin a danglamna chu a lo thleng thut a nih chuan. Doctor pan nghal rawh.
• Diabetes ang chi natna khirh tak tak i neih chuan uluk taka thunun tur a ni. Hei hian i mit a nghawng tha lo chu a tihtlem thei a ni.
• I mit kha chawlh tir rawh: A bik takin visual work tam tak i thawh emaw, computer screen en reng chunga hun tam tak i hman emaw chuan i mit chawlh tir a pawimawh hle. 20-20-20 rule i hmang thei : Minute 20 danah feet 20 vela hlaa thil awm chu second 20 chhung en thin ang che.

A tawp berah chuan thil hriat reng tur (Take-Home Message) .

I visual acuity test score eng pawh ni se, i mit chu i chhehvel khawvel i hmuh theihna window ang mai a ni. Anmahni enkawl that a pawimawh hle. Chutianga i tih chuan i mit hmuhna hloh theihna a ti tlem thei a ni.

20/20 hi "normal" vision mai a ni tih hre reng ang che, "perfect" vision a ni lo. Thil ngaihtuah tur i neih emaw, i mit hmuh dan i chiang lo emaw a nih chuan mit lam doctor pan hi a finthlak fo ang.

` Mit hmuhna, 20/20-a mit hmuhna, mit hmuhna, mit endikna, mit natna, mittui tlakna, mit hmuhna, mitdelna tihchangtlun