Photography & Videography 8% Flashcards
____&_____ can be accomplished very efficiently with a smart phone camer.
Ophthalmic photo and videography
Smart phone cameras that are used for Ophthalmic photo and videography should have a minimum of _____megapixels
5
_____is of the utmost importance and a ____camera is also important with ophthalmic photo and videography
ideal lighting
steady
How can you steady your phone camera when using through the slit lamp?
Use an adapter, tripod and have steady hands
What are the 3 broad categories of illumination techniques for photo and videography?
Room lights, focused light sources, and the slit beam
If you use a focused light source how can it be held?
pt hold it, clip to slit lamp, or have an assistant hold it
For optimal results using a focused light source the light should be held in line with the _____
pupillary axis
For ____illumination use a narrow slit beam on a low-med intensity setting
slit lamp
(can be used along with transilluminator toward the pupillary axis)
When thinking about Illumination techniques in photo and video you can use _____or ____for focused light source
penlight
transilluminator
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.
K
anterior seg
diopter
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.
External
When performing slit lamp photography you should use the ____mode
Macro mode (flower symbol)
Why should you use the Macro mode when doing slit lamp photography?
Because it allows things to be photographed from very close(2”-4” away), provides greater detail.
When performing slit lamp photography have the flash____ and focus through either optical.
off
Slit lamp photo: look through ocular using ____viewfinder on camer
LCD
Slit lamp photo: How do you center and focus object?
By moving slit lamp in and out
Slit lamp photo: Illumination should be ______
Flat and even
When doing slit lamp photo take _____first then zoom in to photo pathology to show greater detail
orientation
Slit lamp photo: use ___to emphasize areas of elevation and depression.
slit beam
Why should you have an assistant with a transilluminator?
To provide different lighting techniques
When photographing pathology your first photograph should be an _________
orientation photo
What is an orientation photo?
low magnification, flat even illumination showing the pathology as well as the structures around the pathology
What is the purpose of an orientation photo?
it orients the viewer to where the pathology is in relation to other structures
After taking the orientation photo you then zoom in and take photo of_____to show it in greater detail.
the pathology
What are the different techniques of slit lamp illumination?
Direct focal illumination
Tangential Illumination
Iris transillumination
Retroillumination
Sclerotic Scatter
______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)
Direct focal illumination
The simplest method of illumination and is usually the primary method used by physicians to evaluate the eye using the biomicroscope
Direct focal illumination
______illumination is where you apply a moderate slit beam directed to strike the object of regard without illuminating the surfaces in front of it.
Tangential illumination
Illumination that enhances surface texture and creates distinct highlights and shadows even on tissue that normally appears very smooth.
tangential
____is similar to retroillumination except it is done with only a very slightly dilated pupil.
Iris transillumination
______used to illuminate defects in the pigment layer of the iris.
Iris transillumination
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.
Iris transillumination
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 _____
fundus
______from the iris is where we have reflective light which can indirectly illuminate subtle abnormalities in structures anterior to them.
Retroillumination
____is visible against the bright background created by the reflecting surface.
Pathology
____is an excellent technique to detect subtle K pathology that could be difficult to view otherwise.
Retroilluminaiton (from iris)
______is useful for providing a dark background against which you can view changes in the K
Sclerotic Scatter
To do Sclerotic scatter method use a _____slit beam. Aim it at the ____ at about a ___degrees.
broad
limbus
45
Scleratic scatter causes a phenomena called______
Total internal reflection
Total internal reflection is the same optical phenomenon that ____use
gonio lenses
Pathology of the cornea is visible by the_________towards the microscope
scattering of light
Examination of the AC for cells or flare must be performed prior to _____
dilation and tension by applanation
Why must flare and cells be checked before dilation?
Because dilation increases the cells and fluorescein increases the flare
To perform examination of AC for cells or flare…..
perform prior to dilation and applanation
Use high mag and highest illumination that the pt can tolerate
Use a short beam
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
Tyndall’s phenomenon
Depression is evident by the light bending ____the beam
away from
Elevation is evident by light bending ____the beam
toward
Many digital fundus camera have _____ and _____ capabilities
anterior segment and external imaging
Digital fundus camera a switch on them that allows you to change the ____ so that closer structures can be imaged.
focal point
Fundus photography requires a ______flash
bright
Fundus photo light source comes from _____(no other camera works this way)
within camera
The darker the pigment that ___the flash needed for fundus photo
brighter
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.
dilate
___cameras have special features to allow you to create quality images even through smaller pupil
non-myd
To take stereo photos take 2 photos of the same object of regard from _____ then software will make them into a 3D image.
2 slightly different angles
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)
spherical
The astigmatic correction device on some cameras are used for correcting ____astig that can occur when imaging the far peripheral retina.
induced
(not refractive astig)
