Normal Eyelid Sensation Distribution
| Status: | Not yet recruiting |
|---|---|
| Healthy: | No |
| Age Range: | 18 - Any |
| Updated: | 2/7/2015 |
| Start Date: | July 2014 |
| Contact: | Michael Richard, MD |
| Email: | michael.richard@dm.duke.edu |
| Phone: | 9196844224 |
The purpose of this study is to determine normal eyelid sensation distribution using a
Cochet-Bonett Aesthesiometer.
Cochet-Bonett Aesthesiometer.
After proper taken consent patients without previous eyelid surgery in the Oculoplastic
clinic at Duke Eye Center and Duke Aesthetic Center will be enrolled to test the eyelid
sensation distribution using the Cochet-Bonnet aesthesiometer. The aesthesiometer (Luneau
ophthalmologie) with a 0.12mm diameter filament was chosen for its ease of use, sensitivity,
and safety. This instrument contains a 6 cm long, retractable, flexible monofilament. For
any given length, when applied perpendicularly to test surface, the filament will exert a
precise pressure before visibly bending. The filament length inversely corresponds to the
pressure exerted by the aesthesiometer.
Selection of eyelid laterality will be randomized on the same day of the study. Ipsilateral
upper and lower eyelids will be divided in thirds (medial, central and lateral borders)
including the margin (fig.2). The eyelid sensation will be tested on every third by applying
the tip of the aesthesiometer filament perpendicular to the eyelid skin and tarsal plate
until the filament bent slightly. The filament length will be set at 6 cm (longest length)
and applied to the test site 3 times. This process will be repeated 3 times and if the
patient verbally responded to the 3rd touch, the number 6 will be recorder.
If the patient responded less than 3 of the 3 times, the filament will be shortened by 0.5
cm and the test will be repeated. This process will be continued by shortening the filament
0.5 cm each time, until the patient feels the filament touch 3 of 3 times. This filament
length number will be recorded as the touch reading for that time period.
The mean touch thresholds for the various test sites will be compared using a Freidman
two-way analysis variant (ANOVA).
clinic at Duke Eye Center and Duke Aesthetic Center will be enrolled to test the eyelid
sensation distribution using the Cochet-Bonnet aesthesiometer. The aesthesiometer (Luneau
ophthalmologie) with a 0.12mm diameter filament was chosen for its ease of use, sensitivity,
and safety. This instrument contains a 6 cm long, retractable, flexible monofilament. For
any given length, when applied perpendicularly to test surface, the filament will exert a
precise pressure before visibly bending. The filament length inversely corresponds to the
pressure exerted by the aesthesiometer.
Selection of eyelid laterality will be randomized on the same day of the study. Ipsilateral
upper and lower eyelids will be divided in thirds (medial, central and lateral borders)
including the margin (fig.2). The eyelid sensation will be tested on every third by applying
the tip of the aesthesiometer filament perpendicular to the eyelid skin and tarsal plate
until the filament bent slightly. The filament length will be set at 6 cm (longest length)
and applied to the test site 3 times. This process will be repeated 3 times and if the
patient verbally responded to the 3rd touch, the number 6 will be recorder.
If the patient responded less than 3 of the 3 times, the filament will be shortened by 0.5
cm and the test will be repeated. This process will be continued by shortening the filament
0.5 cm each time, until the patient feels the filament touch 3 of 3 times. This filament
length number will be recorded as the touch reading for that time period.
The mean touch thresholds for the various test sites will be compared using a Freidman
two-way analysis variant (ANOVA).
Inclusion Criteria
- Capable and willing to provide consent
- Has been seen for the first time in the Oculoplastic clinic and does not have
previous eyelid surgery
- At least 18 years of age
Exclusion Criteria:
- Unable or unwilling to give consent
- Under 18 years of age
- Previous eyelid surgery
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