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20 Cards in this Set
- Front
- Back
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The 3 - M fundus contact lens is used to get a ______________ view of the retina from the ______________ to the ______________.
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Stereoscopic
Posterior pole to ora serrate. |
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With 3 - M, the entire ______________ can be visualized.
There are ______________ viewing surfaces. |
Vitreous
4 |
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The central lens is a ______________ lens and displays the central fundus ______________ from the axis.
The 3 mirrors are spaced ______________ apart with varying angles of inclination. |
64 D
30 degrees 120 degrees |
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1) Smallest Mirror:
Shape:______________ Angle:______________ Zone of visibility:______________ |
1) Smallest Mirror:
Shape:Thumbnail Angle:59 degrees Zone of visibility:ORA SERRATA to PARS PLANA |
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2) Medium Mirror:
Shape:______________ Angle:______________ Zone of visibility:______________ |
2) Medium Mirror:
Shape: Rectangle Angle: 67 degrees Zone of visibility: Anterior Equator to Posterior ORA |
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3) Largest Mirror:
Shape:______________ Angle:______________ Zone of visibility:______________ |
3) Largest Mirror:
Shape: Trapezoid Angle: 73 degrees Zone of visibility: Equatorial fundus |
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The mirror tilted ______________ from the pupil makes the view ______________.
The mirror tilted ______________ from the pupil makes the view ______________. Anterior means in the direction of the ______________. Posterior means in the direction of the ______________. The terms used to locate a lesion or discuss the retina are ______________. |
Away = more Anterior
Toward = more Posterior Anterior - ORA Posterior - Posterior Pole Relative |
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The EQUATOR lies ______________ to the VORTEX VEINS and ______________ of the posterior pole.
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Posterior to the VV
Anterior to the PP |
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The image in the central lens is NOT ______________ or ______________. Because the lens is continuous with the cornea the ______________ image is formed in the ______________ and therefore NOT ______________ or ______________.
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NOT inverted or reversed
Virtual Vitreous |
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The image in the mirrors is ______________ in and ______________ direction only.
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Reversed
Anterior - Posterior |
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The ______________ and ______________ angle mirrors are used for differential diagnosis of peripheral retina holes, tears, and other anomalies.
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73 degree - Trapezoid - Equatorial fundus
67 degree - Rectangle - Anterior equator to Posterior ora serrata |
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Give 4 contraindications to 3 - M:
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1) Patient with SURGICAL WOUNDS (within 4 months)
2) Pathological EPITHELIAL KERATOPATHIES 3) Possible PERFORATING INJURIES 4) Significant BLUNT TRAUMA injuries |
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Insertion of 3 - M
Insertion with ______________ and ______________ is exactly like when the lens is used for a ______________ lens. The pupil needs to maximally ______________. Start with ______________ light, ______________ magnification and beam width at ______________. |
Anesthetic and gel
Gonio Dilated Coaxial Light, Low Mag, BW = 3-4 mm |
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What is the proper sequence for 3 - M?
What rotation of the 3 - M will achieve this pattern? |
1) Central Lens
2) Biggest Mirror 3) Medium Mirror 4) Thumbnail Mirror CLOCKWISE |
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In 3 - M, tilt the lens in the ______________ direction as the specific examining mirror to extend its peripheral range of view more ______________, or ask the patient to look in the ______________ direction as the mirror.
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Same as mirror - anterior
Opposite |
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What are 3 common errors when performing 3 - M?
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1) Not using proper mirror or sequence
2) Misinterpreting location and size of lesion 3) Too much or too little Celluvisc |
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______________ means closer to OR in the direction of the ORA.
______________ means closer to OR in the direction of the OPTIC NERVE. Posterior Pole implies a specific region which includes: ______________ ______________ ______________ |
Anterior
Posterior 1) Optic Nerve 2) Maculae 3) Posterior Arcades |
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Distances and sizes of lesions are measured in ______________.
The width of your BIO lens is typically ______________. |
Disc diameters
8 DD |
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As you scan toward the periphery with BIO:
1) Old retina moves away from ______________ of the lens. 2) New (more peripheral) retina moves in to the ______________ of the lens. 3) Real temporal retina appears from the ______________ side of the lens. 4) Move ______________ the quadrant you wish to view. |
Top
Bottom Nasal Toward |
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To practice scanning, change patients gaze in ______________ increments to produce overlap of fundus views.
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20 - 30 degrees
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