Impulsive Appraisal gains benefit of Discerning Eye buff on the use that activates the buff, not on the next skill use. This is not how the tooltip reads, as Discerning Eye tooltip implies it only amplifies a single skill use, not two.
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Time: 1am PDT
Frequency: Every time Discerning Eye activates from Impulsive Appraisal
World name: Masamune
Character name: Lucife Xavikon
NPC name: n/a
Monster name: None
Class/Level: Miner(reproducible) -- Likely applies to botanist as well but have not had time to confirm
Party or solo: n/a
In-game time: n/a -- Used various Ephemeral nodes to confirm behavior
Area and coordinates: All areas
Steps:
1. Open Ephemeral node
2. Use collectability glove to enter collection menu
3. Use Impulsive Appraisal
4. Observe collectability gain is stable across uses(always 0.9 x Perception calculation)
5. Observe that when Impulsive Appraisal activates Discerning Eye(30% chance on use), collectability gain increases by 50%
6. Observe that Discerning Eye is still active and works for the following action, as tooltip suggests
<*Add more steps if necessary>

Connection Specs
- Type of internet connection/provider: n/a
- Modem maker/model number: n/a

PC Specs
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n/a
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Laptop Model Name: n/a
Laptop Model Number: n/a

Gamepad Manufacturer: n/a
Gamepad Model Name: n/a
Gamepad Part Number: n/a

Browser Information
- Name and version of the browser currently in-use: Chrome 43.0.2357.130 m
- Internet Explorer Version: 11.0.20