We tried to check the vertical palpebral height when the patient sit up as well as when one lie down
respectively. Measurements of the vertical palpebral height and corneal diameter were taken in
pictures of both eyes of 96 Koreans. They consisted of 59 males and 37 females of average age 25.3.
The picture was taken in the position of primary eyeball, and the measured values were adjusted by
the known photometrical average value of corneal diameter. During adjustment, the ruler tool in the
software Adobe Photoshop was used. They were divided into 4 groups: females with same or
larger (group 1, n=20) and with smaller (group 2, n=17) than 11.3 mm, and males with same or larger
(group 3, n=28) and with smaller (group 4, n=31) than 11.6 mm during sitting position. There was no
statistical difference in the rate of respective postural effect on vertical height according to sex and the
covering amount of cornea. However, the changing amount was meaningful statistically (p=0.000)
through two samples t-test. The average ratio of vertical palpebral height was 1:0.929 (sitting : lying).
We introduce the objective way to compare postural change of vertical dimension of palpebral fissure
through the photometrical method.