Ability for bonus sight range?

Hi, can anyone tell me which abilities can give bonus to a unit's sight range?

Thanks in advance~

there is goblin telescope, check what ability it have == profit.

note: negative bonus to sight range will cause desyncs (just like removing positive bonus)

Nice. Thanks man.

EDIT: I can't find the ability of the name "goblin telescope".. what is the exact name of the ability anyway? The closest that I can find is Goblin Night Scope under "items" and it only gives the carrier Ultravision Ability...

EDIT: oh ok nevermind. The ability is called "Item Sight Range Bonus", 'Alsi'

Yeah, that one is a bit counter-intuitive; it claims to only increase night sight range but instead it's actually a overall sight range increase. The heroes simply have their day vision radius set to 1800 which is already the maximum, so the item only does anything useful during the night, but the ability itself works all the time.

Interesting... and weird...