OCULOPLASTIC: TECHNIQUE FOR FILMING PROCEDURES
Filming oculoplastic surgery (aesthetic and reconstructive surgery of the eyes) is difficult because the operating field is too large to use the microscope and too small to use a conventional camera (the camera is too heavy and cumbersome, and the framing is too wide given the focal length, requiring digital cropping which results in a major loss of definition).
The arrival of the I Phone 15 and 16 can simplify things considerably. Thanks to their compactness and the performance of their sensor (48 million pixels for the 16), we can maintain good definition even when zooming in to crop.
FASTENING SYSTEM
Go to https://www.quadlockcase.eu/fr/
5 pieces are needed to attach the telephone to the block microscope:
- the matching case for your I phone
- 3M hook-and-loop system for securing the base to the microphone (it can be easily removed if it gets in the way of your colleagues)
- The patella attaches to the microscope
- 9 cm arm
- the quick-release system the hull
Glue the 3M system to the back of the microphone if you have a Zeiss Lumira (this is a flat area with sufficient surface area).
Attach the base, then mount the phone
Turn the microphone upside down so that the phone can be placed directly above the operating field without being obstructed by the eyepieces.
TELEPHONE SETTINGS
- The phone should be positioned about 40 cm above the patient's head.
- There are 3 lenses on the iPhone. Use the one with the medium focal length (magnification of one). You can use the phone's telephoto lens, but you'll need to increase the distance from the patient to focus (due to the longer focal length). This clears the area and increases the operator's comfort, but the field will be wider, forcing the use of the digital zoom, giving poorer definition.
- Image format must be 1/1 (square)
- Encoding is in 4K, 8 bits for colors, and 60 frames per second
- Phone must be fully charged (limited autonomy)
USING THE FILMIC PRO APP
Once in place, the phone's screen cannot be accessed to check centering and focus during the operation. An app (for a fee of €3 per week, but you can cancel your subscription at any time) will enable you to control the iPhone remotely, using either a second phone or an iPad.
- open filmic pro on tel and ipad, both devices must be connected to the same wifi network
- Open the notched wheel at top left
- A window opens with different boxes
- Press video to set shooting parameters
- ratio H /L 1/1 (square)
- 4K and 8-bit
- 60 fps
- Return to the window and press "device".
- On the phone that's filming, press "satellite camera" for the camera's role.
- On the ipad, press "remote control".
- The shooting interface opens
Use the grid (top right icon) to better control centering.
Press the angled icon at bottom left and select the intermediate lens (magnification 1)
Press the white balance button (bottom left icon) and move the cursor to match the colors.
Press the wifi icon (also bottom left), a window appears, press connect
The image filmed by the I phone appears
Zoom in with the little bar on the right to get the right framing.
the orange circle corresponds to the light analysis, place it in the central rectangle then press it to block the measurement, the circle turns red.
The square corresponds to the focus; place it in the center and lock it; it turns red.
To start recording, press the white icon at bottom right and check that the time code is scrolling.
ASSEMBLY
Editing can be done with I movie if it is limited to cutting clips and editing them one after the other with a fade as a transition.
If you want something a little more sophisticated (inlaying your name, your band's logo, mixing several windows on the screen), I'd recommend screenflow (€250).