Comparison between vision changing traits

I compared several traits that change the vision cones and awareness zones around the character.

Eagle eye increases the vision cone slightly.
Cat eye's increases the vision cone extremely slightly.
Short sighted did nothing (that I could tell)

Keen hearing doubles the awareness radius.
Hard of hearing does nothing to the radius.
Being DEAF somehow also does nothing to the radius.

Eagle eye + Cat eyes

Eagle eye

No perks

Short Sighted

Keen Hearing

No perks again

Hard of hearing

Deaf

Notes

I wanted maximum zombies to demonstrate exactly what you could see but unfortunately at a limit, far away zombies are rendered black.

Its very difficult to see and change with cat eyes, maybe 1-2 degrees of view.

Short sighted really didn't seem to do anything. I could see zombies and maximum zoom and no change to the cone occurred.

My biggest surprise was deaf being able to see zombies move in and out of view behind them.

[Amon]

thx for the explanation
I used to play with deaf trait n didnt notice any difference on the perception radius