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Slit Lamp Illumination Techniques Author:  Irina Jagiloviča e-mail:   [email_address] www:  www.optometristiem.lv
Diffuse Illumination ,[object Object],[object Object],[object Object],[object Object],[object Object]
Diffuse Illumination
Diffuse Illumination
Direct Illumination Techniques ,[object Object],[object Object],[object Object],[object Object],[object Object]
Beam
Beam
Tangential Illumination ,[object Object],[object Object],[object Object],[object Object],[object Object]
Tangential Illumination
Specular Reflection ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Specular Reflection
Specular Reflection
Indirect Illumination ,[object Object],[object Object],[object Object],[object Object]
Proximal
Sclerotic Scatter ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Sclerotic Scatter
Sclerotic Scatter
Sclerotic Scatter
Retroillumination ,[object Object],[object Object]
Retroillumination
Indirect Retroillumination from the Iris ,[object Object],[object Object]
Retroillumination from the Fundus (Red Reflex) ,[object Object],[object Object],[object Object],[object Object]
Retroillumination From the Fundus (Red Reflex)
Van Herrick Technique ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Van Herrick Technique
Van Herrick Technique 1. grade –  risky narrow anterior chamber angle less than 1:4 ratio
[object Object]

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Slit Lamp Illumination Techniques

Hinweis der Redaktion

  1. Difūzo apgaismojumu izmanto vispārējai acs un tās palīgorgānu apskatei nelielā palielinājumā.
  2. Tangenciālais apgaismojums. Tiek uzstādīta vidēji plata sprauga . Spraugas lampa pagriezta gandrīz 90 leņķī pret varavīksneni. Mikroskops fokusēts varavīksnenes plaknē. Šajā apgaismojumā varavīksnenes nelīdzenumi met garu ēnu, metode ir ļoti informatīva varavīksnenes audzēju diagnosticēšanai.
  3. Spoguļatstarošanās. Spraugas lampa un mikroskops tiek novietoti pret apskatāmo struktūru ( radzenes priekšējo vai mugurējo virsmu) tā, ka mikroskopā redz spožu spraugas spoguļattēlu. Lai to panāktu spraugas lampa un mikroskops jānovieto vienādos leņķos pret apskatāmo laukumu. Ja apskatāmā virsma ir nelīdzena tad uz spožā refleksa fona būs redzami tumši laukumi . Šo metodi visbiežāk lieto radzenes endotēlija apskatei , lietojot palielinājumu 40 reizes radzenes endotēlija šūnas ir redzamas kā sīkgraudaina struktūra, ar mazāku palielinājumu endotēlija šūnas nav izšķiramas. Ar šo metodi var labi novērtēt kontaktlēcas priekšējās virsmas kvalitāti
  4. Spoguļatstarošanās. Spraugas lampa un mikroskops tiek novietoti pret apskatāmo struktūru ( radzenes priekšējo vai mugurējo virsmu) tā, ka mikroskopā redz spožu spraugas spoguļattēlu. Lai to panāktu spraugas lampa un mikroskops jānovieto vienādos leņķos pret apskatāmo laukumu. Ja apskatāmā virsma ir nelīdzena tad uz spožā refleksa fona būs redzami tumši laukumi . Šo metodi visbiežāk lieto radzenes endotēlija apskatei , lietojot palielinājumu 40 reizes radzenes endotēlija šūnas ir redzamas kā sīkgraudaina struktūra, ar mazāku palielinājumu endotēlija šūnas nav izšķiramas. Ar šo metodi var labi novērtēt kontaktlēcas priekšējās virsmas kvalitāti
  5. Netiešais apgaismojums. apskatīta tiek acs daļa, kas nav tieši apgaismota. Ja dzidrajā struktūrā ir lokalizēts apduļķojums to novēro kā gaišu objektu uz tumša fona.
  6. Netiešais apgaismojums. apskatīta tiek acs daļa, kas nav tieši apgaismota. Ja dzidrajā struktūrā ir lokalizēts apduļķojums to novēro kā gaišu objektu uz tumša fona.
  7. Pilnā iekšējā atstarošanās. Gaismas kūlis 1 – 1,5 mm plats. Tas tiek projicēts tuvu pie radzenes limba . Gaisma iekļūst radzenē un atstarojoties no radzenes virsmām pārvietojas pa to kā pa gaismas vadu . Ja radzenē ir apduļķojums tad pilnā iekšējā atstarošanās tiek izjaukta un gaisma izkļūst no radzenes audiem. Šajā tehnikā parasti radzeni apskata bez mikroskopa, ja izmanto mikroskopu, tad gaismas kūlis jāvirza tā, lai tas kristu ārpus mikroskopa redzes lauka , to panāk pagriežot spraugas lampas spoguli . Ne visos instrumentu modeļos ir paredzēta iespēja spoguli pagriezt.
  8. Pilnā iekšējā atstarošanās. Gaismas kūlis 1 – 1,5 mm plats. Tas tiek projicēts tuvu pie radzenes limba . Gaisma iekļūst radzenē un atstarojoties no radzenes virsmām pārvietojas pa to kā pa gaismas vadu . Ja radzenē ir apduļķojums tad pilnā iekšējā atstarošanās tiek izjaukta un gaisma izkļūst no radzenes audiem. Šajā tehnikā parasti radzeni apskata bez mikroskopa, ja izmanto mikroskopu, tad gaismas kūlis jāvirza tā, lai tas kristu ārpus mikroskopa redzes lauka , to panāk pagriežot spraugas lampas spoguli . Ne visos instrumentu modeļos ir paredzēta iespēja spoguli pagriezt.
  9. Retroiluminācija. Instruments uzstādīts kā platas spraugas gadījumā. Gaisma tiek virzīta uz necaurspīdīgu acs struktūru – varavīksneni, tīkleni un tiek apskatīta kāda dzidra acs struktūra uz apgaismotā fona, izkliedējoši vai necaurspīdīgi objekti redzami kā tumši plankumi uz gaiša fona.
  10. Retroiluminācija. Instruments uzstādīts kā platas spraugas gadījumā. Gaisma tiek virzīta uz necaurspīdīgu acs struktūru – varavīksneni, tīkleni un tiek apskatīta kāda dzidra acs struktūra uz apgaismotā fona, izkliedējoši vai necaurspīdīgi objekti redzami kā tumši plankumi uz gaiša fona.