This study is evaluating the pupil dilation of Horner's Patients who have ever taken an alpha blocker such as Tamsulosin. Patients will undergo eye dilation as would occur at a yearly eye examination, but their pupil dilation measurements will be recorded.
This study will enroll 10 participants who have a unilateral Horner's Syndrome AND have a history of taking an alpha blocker such as Tamsulosin. Participants will be recruited based on those two enrollment criteria, and after consenting they will undergo pupil dilation with 10% phenylephrine. Once fully dilated the pupil size will be measured. Pupil dilation size of the eye affected by the Horner's Syndrome will be compared to the eye not affected by Horner's. Primary study outcome is the comparative dilation size of the Horner's affected eye to the non affected eye in all subjects.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
OTHER
Masking
NONE
Enrollment
1
10% phenylephrine is a drug that can be used to dilate patient's eyes at their yearly eye examination. All enrolled subjects will receive this drug for their eye dilation.
University of Colorado Hospital, Rocky Mountain Lions Eye Institute
Denver, Colorado, United States
Denver Health
Denver, Colorado, United States
Pupil Size Measurements
pupil dilation measurements will be taken of each eye at the eye examination.
Time frame: 20-30 minutes after 10% phenylephrine has been placed in each eye.
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