Sony UWP-D27 2-Person Camera-Mount Wireless Omni Lavalier Microphone System (UC90: 941 to 960 MHz) - Manual (Page 107)

Help Guide
Interchangeable Lens Digital Camera
ILCE-7C α7C
Eye-Start AF (still image)
Sets whether or not to use autofocus when you look through an Electronic Viewfinder.
Menu item details
On:
Auto focusing starts when you look through the Electronic Viewfinder.
Off:
Auto focusing does not start when you look through the Electronic Viewfinder.
Hint
[ Eye-Start AF] is available when an A-mount lens and a Mount Adaptor LA-EA4 (sold separately) are attached.
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MENU → (Camera Settings1) → [ Eye-Start AF] → desired setting. 1
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