# pupil feedback loop
# real-time eyelink stream

import pylink
from psychopy import visual, core

tracker = pylink.EyeLink()
tracker.openDataFile('pupil.edf')

def get_pupil_size():
    s = tracker.getNewestSample()
    if s is not None:
        return s.getRightEye().getPupilSize()
    return None

conditions = ['dilate', 'constrict', 'rest']

# pupil feedback loop
# real-time eyelink stream

import pylink
from psychopy import visual, core

tracker = pylink.EyeLink()
tracker.openDataFile('pupil.edf')

def get_pupil_size():
    s = tracker.getNewestSample()
    if s is not None:
        return s.getRightEye().getPupilSize()
    return None

conditions = ['dilate', 'constrict', 'rest']

# pupil feedback loop
# real-time eyelink stream

import pylink
from psychopy import visual, core

tracker = pylink.EyeLink()
tracker.openDataFile('pupil.edf')

def get_pupil_size():
    s = tracker.getNewestSample()
    if s is not None:
        return s.getRightEye().getPupilSize()
    return None

conditions = ['dilate', 'constrict', 'rest']

# pupil feedback loop
# real-time eyelink stream

import pylink
from psychopy import visual, core

tracker = pylink.EyeLink()
tracker.openDataFile('pupil.edf')

def get_pupil_size():
    s = tracker.getNewestSample()
    if s is not None:
        return s.getRightEye().getPupilSize()
    return None

conditions = ['dilate', 'constrict', 'rest']

# pupil feedback loop
# real-time eyelink stream

import pylink
from psychopy import visual, core

tracker = pylink.EyeLink()
tracker.openDataFile('pupil.edf')

def get_pupil_size():
    s = tracker.getNewestSample()
    if s is not None:
        return s.getRightEye().getPupilSize()
    return None

conditions = ['dilate', 'constrict', 'rest']

# pupil feedback loop
# real-time eyelink stream

import pylink
from psychopy import visual, core

tracker = pylink.EyeLink()
tracker.openDataFile('pupil.edf')

def get_pupil_size():
    s = tracker.getNewestSample()
    if s is not None:
        return s.getRightEye().getPupilSize()
    return None

conditions = ['dilate', 'constrict', 'rest']

# pupil feedback loop
# real-time eyelink stream

import pylink
from psychopy import visual, core

tracker = pylink.EyeLink()
tracker.openDataFile('pupil.edf')

def get_pupil_size():
    s = tracker.getNewestSample()
    if s is not None:
        return s.getRightEye().getPupilSize()
    return None

conditions = ['dilate', 'constrict', 'rest']

# pupil feedback loop
# real-time eyelink stream

import pylink
from psychopy import visual, core

tracker = pylink.EyeLink()
tracker.openDataFile('pupil.edf')

def get_pupil_size():
    s = tracker.getNewestSample()
    if s is not None:
        return s.getRightEye().getPupilSize()
    return None

conditions = ['dilate', 'constrict', 'rest']