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COT > Photography & Videography 8% > Flashcards

Photography & Videography 8% Flashcards

1
Q

____&_____ can be accomplished very efficiently with a smart phone camer.

A

Ophthalmic photo and videography

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2
Q

Smart phone cameras that are used for Ophthalmic photo and videography should have a minimum of _____megapixels

A

5

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3
Q

_____is of the utmost importance and a ____camera is also important with ophthalmic photo and videography

A

ideal lighting
steady

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4
Q

How can you steady your phone camera when using through the slit lamp?

A

Use an adapter, tripod and have steady hands

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5
Q

What are the 3 broad categories of illumination techniques for photo and videography?

A

Room lights, focused light sources, and the slit beam

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6
Q

If you use a focused light source how can it be held?

A

pt hold it, clip to slit lamp, or have an assistant hold it

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7
Q

For optimal results using a focused light source the light should be held in line with the _____

A

pupillary axis

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8
Q

For ____illumination use a narrow slit beam on a low-med intensity setting

A

slit lamp
(can be used along with transilluminator toward the pupillary axis)

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9
Q

When thinking about Illumination techniques in photo and video you can use _____or ____for focused light source

A

penlight
transilluminator

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10
Q

You can get attachments for phone with photo illuminators(blue, LED, and flueorescein for____ and white for ______) and ___lens adapters so that you can change the focal point of the camera.

A

K
anterior seg
diopter

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11
Q

You should consider using an ____light source such as pen light or transilluminator in addition to your smart phone camera illumination because it give you better illumination and more options for illuminating the object of regard.

A

External

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12
Q

When performing slit lamp photography you should use the ____mode

A

Macro mode (flower symbol)

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13
Q

Why should you use the Macro mode when doing slit lamp photography?

A

Because it allows things to be photographed from very close(2”-4” away), provides greater detail.

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14
Q

When performing slit lamp photography have the flash____ and focus through either optical.

A

off

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15
Q

Slit lamp photo: look through ocular using ____viewfinder on camer

A

LCD

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16
Q

Slit lamp photo: How do you center and focus object?

A

By moving slit lamp in and out

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17
Q

Slit lamp photo: Illumination should be ______

A

Flat and even

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18
Q

When doing slit lamp photo take _____first then zoom in to photo pathology to show greater detail

A

orientation

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19
Q

Slit lamp photo: use ___to emphasize areas of elevation and depression.

A

slit beam

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20
Q

Why should you have an assistant with a transilluminator?

A

To provide different lighting techniques

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21
Q

When photographing pathology your first photograph should be an _________

A

orientation photo

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22
Q

What is an orientation photo?

A

low magnification, flat even illumination showing the pathology as well as the structures around the pathology

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23
Q

What is the purpose of an orientation photo?

A

it orients the viewer to where the pathology is in relation to other structures

24
Q

After taking the orientation photo you then zoom in and take photo of_____to show it in greater detail.

A

the pathology

25
Q

What are the different techniques of slit lamp illumination?

A

Direct focal illumination
Tangential Illumination
Iris transillumination
Retroillumination
Sclerotic Scatter

26
Q

______is illumination technique that uses a wide or narrow slit beam. This can showcase optical sectioning such as showing the layers of the cornea. Can also use with pinpointed slit beam to show cells and flare in the in the AC (Tendal’s phenomenon)

A

Direct focal illumination

27
Q

The simplest method of illumination and is usually the primary method used by physicians to evaluate the eye using the biomicroscope

A

Direct focal illumination

28
Q

______illumination is where you apply a moderate slit beam directed to strike the object of regard without illuminating the surfaces in front of it.

A

Tangential illumination

29
Q

Illumination that enhances surface texture and creates distinct highlights and shadows even on tissue that normally appears very smooth.

A

tangential

30
Q

____is similar to retroillumination except it is done with only a very slightly dilated pupil.

A

Iris transillumination

31
Q

______used to illuminate defects in the pigment layer of the iris.

A

Iris transillumination

32
Q

In_____A full circle bean is directed through the pupil and should be about the size of the pupil but not large enough to strike any edges of the iris.

A

Iris transillumination

33
Q

In iris illumination the full circle beam is focused at the iris plane and defects in the iris are visible by transmission of light that is reflected from the _____

A

fundus

34
Q

______from the iris is where we have reflective light which can indirectly illuminate subtle abnormalities in structures anterior to them.

A

Retroillumination

35
Q

____is visible against the bright background created by the reflecting surface.

A

Pathology

36
Q

____is an excellent technique to detect subtle K pathology that could be difficult to view otherwise.

A

Retroilluminaiton (from iris)

37
Q

______is useful for providing a dark background against which you can view changes in the K

A

Sclerotic Scatter

38
Q

To do Sclerotic scatter method use a _____slit beam. Aim it at the ____ at about a ___degrees.

A

broad
limbus
45

39
Q

Scleratic scatter causes a phenomena called______

A

Total internal reflection

40
Q

Total internal reflection is the same optical phenomenon that ____use

A

gonio lenses

41
Q

Pathology of the cornea is visible by the_________towards the microscope

A

scattering of light

42
Q

Examination of the AC for cells or flare must be performed prior to _____

A

dilation and tension by applanation

43
Q

Why must flare and cells be checked before dilation?

A

Because dilation increases the cells and fluorescein increases the flare

44
Q

To perform examination of AC for cells or flare…..

A

perform prior to dilation and applanation
Use high mag and highest illumination that the pt can tolerate
Use a short beam

45
Q

Phenomena Where you shine one part of the beam onto to the pts lens and the other part onto their K, illuminating cells and flare in the AC

A

Tyndall’s phenomenon

46
Q

Depression is evident by the light bending ____the beam

A

away from

47
Q

Elevation is evident by light bending ____the beam

A

toward

48
Q

Many digital fundus camera have _____ and _____ capabilities

A

anterior segment and external imaging

49
Q

Digital fundus camera a switch on them that allows you to change the ____ so that closer structures can be imaged.

A

focal point

50
Q

Fundus photography requires a ______flash

A

bright

51
Q

Fundus photo light source comes from _____(no other camera works this way)

A

within camera

52
Q

The darker the pigment that ___the flash needed for fundus photo

A

brighter

53
Q

Fundus Photo: you’ll need to _____ the pupil or if you are using a non-myd camera you may be able to image through a smaller pupil.

A

dilate

54
Q

___cameras have special features to allow you to create quality images even through smaller pupil

A

non-myd

55
Q

To take stereo photos take 2 photos of the same object of regard from _____ then software will make them into a 3D image.

A

2 slightly different angles

56
Q

With fundus photography you must correct for high ____errors. Adjust the setting with the knob that has a plus or minus to indicate correction for the refractive error (astig not a concern)

A

spherical

57
Q

The astigmatic correction device on some cameras are used for correcting ____astig that can occur when imaging the far peripheral retina.

A

induced
(not refractive astig)

COT (28 decks)

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