OCULOPLASTICS: TECHNIQUE FOR FILMING PROCEDURES 

Filming surgical procedures in the field of oculoplastics (aesthetic and reconstructive surgery of the eye area) is difficult because the surgical field is too large to use a microscope and too small to use a conventional camera (the device is too heavy and bulky, and the framing is too wide given the focal length, requiring digital cropping that results in a major loss of definition).

The arrival of the IPhone 15 and 16 can greatly simplify things. Indeed, thanks to their compactness and the performance of their sensor (48 million pixels for the 16), good definition is maintained even when zooming to crop.

MOUNTING SYSTEM 

Go to the website https://www.quadlockcase.eu/fr/

5 parts are needed to attach the phone to the microscope in the operating room:

• The case corresponding to your I phone 
• The 3M adhesive system for attaching the base to the microscope (it can be easily detached if it bothers your colleagues) 
• The ball joint attaching to the microscope
• A 9 cm arm
• The quick-release case attachment system

Attach the 3M system to the rear of the microscope if you have a Lumira from Zeiss (it's a flat area with sufficient surface)

Attach the base and then mount the phone 

Turn the microscope over so you can place the phone just above the surgical field without being obstructed by the eyepieces 

PHONE ADJUSTMENT 

•  The phone should be placed approximately 40 cm above the patient's head.
• There are 3 lenses on the iPhone. Use the one with the medium focal length (1x magnification). 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 of view will be wider, requiring the use of digital zoom, which results in lower definition.
• The image format must be 1/1 (square). 
• Encoding is in 4K, 8 bits for colors, and 60 frames per second. 
•  The phone should be fully charged (limited battery life).  

 USING THE FILMIC PRO APP

Once in place, the phone's screen is not accessible to control centering and focus during the procedure. An app (paid, €3 per week, but you can cancel the subscription at any time) will allow you to control the iPhone remotely with either a second phone or an iPad.

• Open Filmic Pro on both the phone and the iPad; both devices must be connected to the same Wi-Fi network. 
• Open the cogwheel at the top left. 
• A window will open with different boxes. 
• Press video to define the shooting parameters.
• Aspect ratio H/L 1/1 (square) 
•  4K and 8 bits 
• 60 frames/sec
• Return to the window and then press "device".
• On the phone that is filming, press "satellite camera" to set the device's role.
• On the iPad, press "remote control".
• The shooting interface will open.

Activate the grid (icon at the top right); it allows for better control of centering.

Press the icon forming an angle at the bottom left and choose the intermediate lens (1x magnification).

Press the white balance (icon at the bottom left) and move the cursor to get appropriate colors.

Press the Wi-Fi icon (also at the bottom left); a window appears, press connect.

The image filmed by the iPhone appears.

Zoom in with the small bar on the right to get the correct framing. 

The orange circle corresponds to the light analysis; place it in the central rectangle and then tap it to lock the measurement; the circle turns red. 

The square corresponds to the focus; also place it in the center and lock it; it turns red. 

To start recording, press the white icon at the bottom right and check that the time code is running. 

EDITING

Editing can be done with iMovie if it is limited to cutting clips and assembling them one after the other with a crossfade as a transition. 

If you want something a little more sophisticated (embedding your name, your group's logo, mixing multiple windows on the screen), I recommend screenflow (250 €).

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