Can't see it in the menu which was no real surprise as I'd have been surprised if it was there and I'd missed it. No biggie. Face detect seems good enough and any slight oof on the eye will only really be visible when looking very closely.
Eye AF is there on the original A7 and definitely works it shows the face box rather than eye like the newer models and only in AFS. This will help.
1. MENU →
(Custom Settings) → [Custom Key Settings] → assign the [Eye AF] function to the desired key.
2. Press the key to which you have assigned the [Eye AF] function and focus on the eyes. 3. Press the shutter button while pressing the key.
Depending on the circumstances, the camera may not be able to focus on the eyes. In such cases, the camera detects a face and focuses on the face.
If the camera cannot detect a person’s face, you cannot use [Eye AF].
Depending on the circumstances, you cannot use [Eye AF], such as when [Focus Mode] is set to [Continuous AF] or [Manual Focus], etc.
[Eye AF] may not function in the following situations:
When the person is wearing sunglasses. When the front hair covers the person’s eyes. In low-light or back-lit conditions.
When the eyes are closed.
When the person is in the shade.
When the person is out of focus.
When the camera focuses on the eyes and [Smile/Face Detect.] is set to [On], a detection frame is displayed on the face after it is displayed on the eyes. When [Smile/Face Detect.] is set to [Off], a detection frame is displayed on the eyes for a certain time.