If yu na pɔsin we de wɛr glas, yu nid fɔ tink bɔt mɔ pas di nɔmba dɛn we de na yu mɛrɛsin. Sɔntin de bak we impɔtant ikwal, bɔt sɔntɛm pipul dɛn nɔ no bɛtɛ, we yu nɔ go dɔn yɛri bɔt. Na di mɛzhɔmɛnt we dɛn kɔl Pupillary Distance, ɔ ‘PD’ fɔ shɔt. Lɛ wi tek tɛm luk wetin i bi, wetin mek i rili impɔtant, ɛn aw fɔ mɛzhɔ am na os.
Fɔ tɔk am simpul wan, wetin na Pupillary Distance (PD)?
Pupillary Distance (PD) na di distans bitwin di sεntrכm pכynt dεm na di tu blak ring dεm (pupil dεm) na yu yay. Dɛn kin mɛzhɔ am insay milimita (mm). sכmtεm dεn kin kכl am ``Intapupilari Distans - ID''.
Imajin se we yu de mek glas, yu nid fɔ ajɔst di lens so dat di pawa pɔynt we ay pas ɔl go de jɔs bifo yu ayris. If nɔto dat, yu nɔ go si klia wan. Dis na di say we di PD mɛzhɔmɛnt impɔtant fɔ mek di kɔrɛkt ajɔstmɛnt. If yu de bay glas ɔnlayn, yu go mɔs nid dis PD mɛzhɔmɛnt wit yu prɛskrishɔn.
Aw fɔ mɛzhɔ yu PD na os?
Di bɛst we fɔ rili gɛt dis mɛzhɔmɛnt na fɔ mek pɔsin we tren fɔ du am, lɛk yu yay dɔktɔ ɔ pɔsin we de wok fɔ yu yay, bikɔs na da we de kɔrɛkt pas ɔl.
Bɔt if yu want fɔ mɛzhɔ yusɛf, we dɛn de fɔ du dat bak. Ɔl wetin yu nid na wan mɛzhɔmɛnt tep we dɛn mak wit milimita (mm) ɛn wan miro. Sɔntɛnde, yu kin fɛn spɛshal mɛzhɔmɛnt tep dɛn ɔ ivin smart fon ap dɛn we dɛn mek fɔ dis. Bɔt mɛmba se di akkuracy kin ɔf smɔl we yu de mɛzhɔ yusɛf ɔ wit ap.
If yu wan meja yusef...
If yu wan de du dis, yu nid fɔ tek tɛm smɔl. Fɔ fala dɛn step ya.
| Step dɛn we yu fɔ du | Wetin fɔ du |
|---|---|
| 1. Fɔ pripia | Insay say we gɛt layt, tinap bifo miro we de lɛk 18 inch so. |
| 2. Fɔ put di fut rɛst | Tɔn di milimita mak dɛn na di tep mɛzhɔ so dat yu go si dɛn na di miro, ɛn ol dɛn ɔnda yu yay ɛn ɔp yu nos. I tan lɛk se yu de luk oba wan wɔl. |
| 3. Fɔ mɛzhɔ di rayt yay | Klos yu lɛft yay. Yuz yu rayt yay nɔmɔ fɔ put di ziro (0) mak na di rula jɔs midul di blak sɛklɔ na yu rayt yay. Nɔ muv di rula frɔm dis pɔynt. If i du dat, bigin bak. |
| 4. Fɔ mɛzhɔ di lɛft yay | Naw opin yu lɛft yay ɛn lɔk yu rayt yay. We yu luk ɔl yu lɛft yay, si us milimita mak de dairekt na di midul pan yu lɛft yay in blak sɛklɔ. |
| 5. Tek di mɛzhɔmɛnt | Di milimita valyu we yu go fɛn go bi yu PD mɛzhɔmɛnt. |
If yu mɛzhɔ wit pɔsin in ɛp...
Dis kin izi pas fɔ du am yu wan. Di pɔsin we de ɛp yu fɔ du am dis we.
| Step dɛn we yu fɔ du | Wetin di pɔsin we de ɛp fɔ du |
|---|---|
| 1. Fɔ pripia | Sidɔm bifo di pɔsin we yu want fɔ mɛzhɔ, lɛk 18 inch so. Kip yu ɔl tu fes dɛn na di sem lɛvul. |
| 2. Fɔ put di fut rɛst | Put di fut ɔnda di ɔda pɔsin in yay ɛn ɔp in nos. |
| 3. Fɔ mɛzhɔ di rayt yay | Aks di pɔsin we de tek di mɛzhɔ fɔ luk stret na yu (di pɔsin we de ɛp yu) lɛft yay . Put di ziro (0) pan di mɛzhɔmɛnt tep na di ɔda edj na di blak ring na di ɔda pɔsin in rayt yay. Nɔ muv di mɛzhɔmɛnt tep frɔm dis pɔynt. |
| 4. Fɔ mɛzhɔ di lɛft yay | Naw aks di ɔda pɔsin fɔ luk stret na yu rayt yay . Naw si us milimita mak kɔrɛkt to di insay edj fɔ di blak ring na dɛn lɛft yay. |
| 5. Tek di mɛzhɔmɛnt | Dat milimita valyu we yu si na in PD mɛzhɔmɛnt. |
Wetin mek dis PD mɛzhɔmɛnt impɔtant so?
Yu no, wi de si tin we layt go insay di yay. Dis layt de go insay di yay tru di pupil. Dɔn da layt de kin pas na di lens ɛn i kin pe atɛnshɔn pan di retina.
Bɔt if yu nɔ de si fayn, dis layt nɔ de fos fayn. Na dat mek wi de si bluri. Fɔ ɛgzampul:
- Fɔ si fa/Hyperopia
- Fɔ si tin nia/Mayopia
- I nɔ izi fɔ si nia as yu de ol (Presbyopia) .
- Astigmatism we pɔsin kin si
Ayglas nɔto wan saiz-fit-ɔl. Dɛn kin difrɛn difrɛn wan bay bɔku tin, lɛk yu prɔblɛm wit yu yay ɛn di trɛnk we yu prɛskrishɔn gɛt.
dis PD mεzhɔmεnt fכ kכrekt fכ mek di pawa we di lens fכ di glas dεm fכ fכkus εksakכt wan pan di sεntrכm pan yu ayris. Na da tɛm de nɔmɔ yu go ebul fɔ gɛt di bɛst pan di glas dɛn ɛn si di wɔl klia wan.
Imajin wetin go apin if di PD mɛzhɔmɛnt nɔ bin rayt...
If dɛn mek di glas dɛn we yu de yuz fɔ di rɔng PD mɛzhɔmɛnt, yu go mɔs bigin fɔ fil am.
- Aystrayn we de mek pɔsin in yay strɛch
- Ed de at
- Visual distortions (we yu si tin dɛn lɛk se dɛn strɛch) .
Pan ɔl we dɛn sayn ya nɔ denja, dɛn nɔ kin rili fil fayn. Dɔn bak, di kɔntinyu fɔ strɛs pan yu yay kin rili mek yu yay wɔs.
di avrej adכlt PD na bכt 63 mm. Bɔt i kin kɔmɔt frɔm 50 to 70 mm. I kin difrɛn frɔm wan pɔsin to ɔda pɔsin. Yu PD kin chenj as yu de gro as pikin, bɔt i nɔ kin chenj as yu de gro to big pɔsin. Bɔt nɔto ɔltɛm, i kin chenj smɔl afta dɛn dɔn du ɔpreshɔn pan in fes ɔ in yay.
Ustɛm i nɔ fayn fɔ mɛzhɔ yu PD yusɛf?
If yu kin yuz yu glas fɔ wan tin (e.g., fɔ rid), fɔ gɛt yu yon mɛzhɔmɛnt nɔ kin bi big tin. Bɔt sɔm spɛshal kes dɛn de we yu rili nid fɔ mɛzhɔ pɔsin we sabi du in wok . Fɔ tray fɔ gɛt yu yon mɛzhɔmɛnt nɔto fayn tin da tɛm de.
| Chans | Rizin |
|---|---|
| If yu nid multifocal lens dɛn | dεn kכl dεn tin ya bak ``Progrεsiv lεns, bifokal, trifokal''. Dɛn lens dɛn ya gɛt difrɛn pawa dɛn na bɔku pat dɛn. So, if di PD mεzhɔmεnt כf bay ivin wan milimita, di vishכn kin kכmplit distort. |
| If yu nid fɔ wɛr glas ɔltɛm fɔ si ɔl tu nia ɛn fa | we wi luk sכmtin we de nia, wi PD de dכn bay lεk 3 milimita. Dis difrɛns fɔ tink bɔt we yu de disayn glas lɛk dis. I impɔtant fɔ mek dɛn mɛzhɔ kɔrɛkt wan fɔ dis. |
| If yu gɛt ɛni misalignment na yu yay | fכ mεdikal, dεn kכl dis ``Strabismus.'' insay dis kes, dεn fכ tek sεparat mεzhɔmεnt fכ εvri yay εn dεn fכ mek di glas dεm rili kכrekt. |
Sɔm kɔntri dɛn gɛt lɔ dɛn we se dɛn fɔ put PD mɛzhɔmɛnt insay yu ayglas prɛskrishɔn. Pan ɔl we nɔto dis kayn lɔ de na wi kɔntri, yu kin aks yu yay dɔktɔ ɔ optiks ɔltɛm fɔ yu PD mɛzhɔmɛnt. Na yu rayt.
Mɛsej we dɛn kin kɛr go na os
- Pupillary Distance (PD) na di distans bitwin di blak ring dεm na yu yay. Dis mɛzhɔmɛnt impɔtant fɔ mek yu gɛt di rayt fit fɔ yu ayglas.
- We yu wɛr glas we dɛn mek fɔ di rɔng PD mɛzhɔmɛnt kin mek yu yay strɛs, yu ed kin at, ɛn yu nɔ kin si fayn.
- Pan ɔl we yu kin tek dis mɛzhɔmɛnt na os, di we we kɔrɛkt ɛn sef pas ɔl na fɔ mek pɔsin we sabi du di wok mɛzhɔ am ɔltɛm.
- Mek shɔ se yu gɛt pɔshɔnal mɛzhɔmɛnt, mɔ if yu de yuz mɔltifokal lens ɔ yu gɛt kɔndishɔn lɛk strabismus.
- If yu prɛskrishɔn nɔ gɛt di PD mɛzhɔmɛnt, nɔ fred fɔ aks yu dɔktɔ ɔ optishan bɔt am.
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