How does a sick man pray by gesturing with his eyes

The questioner : The gesture, O Shaykh, in prayer: if a person is sick and cannot pray except by gesturing with his eyes, for example, and he has designated a place for prostration, a place for bowing, a place for sitting between the two prostrations, and a place for standing, and then during these positions his gaze shifts from the place of bowing to the place of prostration, and so on, does he perform the prostration of forgetfulness, considering that his gaze moved from the place of bowing to the place of prostration?
The Shaykh: And who planned this arrangement for him, such that forgetfulness and prostration would result from it?

The questioner : And how can he determine bowing and prostration with his eyes unless he does so?

The Shaykh : In his mind, he visualizes bowing, prostration, and standing, and so on?

The questioner : Without, I mean?

The Shaykh : No, this arrangement has not been sent down by Allah with any authority, and is there anyone who mentions this among you?

The questioner : No, I mean, this issue was presented to me?

The Shaykh : Okay, someone else.