J Korean Ophthalmol Soc.  2011 Apr;52(4):401-406.

Pupil Size in the Normal Korean Population According to Age and Illuminance

• Ko BU
• Ryu WY
• Park WC

Abstract

PURPOSE
To report the change of pupil sizes according to age and illuminance in the normal Korean population.
METHODS
Normal Koreans outpatients who never had a history of ophthalmic disease were examined. The patients consisted of 320 eyes of 160 patients, which were classified into 8 age decades (teenage to 80's) with 40 eyes in each age group. The vertical and horizontal pupil size and area under 4 different illuminances (3,500, 1,200, 500, 5 lux) were measured using the Colvard pupillometer(R) (OASIS Medical, Glendora, CA, USA).
RESULTS
The pupil size was significantly decreased as the age increased under each illuminance. The pupil area measured after dark adaptation was 47.30 mm2 in the teenage group, 43.32 mm2 in the 20's group, 41.94 mm2 in the 30's group, 40.98 mm2 in the 40's group, 40.61 mm2 in the 50's group, 38.60 mm2 in the 60's group, 37.78 mm2 in the 70's group and 35.45 mm2 in the 80's group. The decrease in pupil area was statistically significant.
CONCLUSIONS
In the normal Korean population, a significant decrease in pupil size and area was observed with aging. The present study results provide good basic data for cataract and presbyopia refractive surgery.

Keyword

Aging; Illuminance; Pupil area; Pupillometer; Pupil size

MeSH Terms

Aging
Cataract
Dark Adaptation
Eye
Humans
Outpatients
Presbyopia
Pupil
Refractive Surgical Procedures

Figure

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  Figure 1. Light-amplification pupillometer (Colvard pupillometer®, OASIS medical, USA) attaching digital camera (A), and pic-ture of the pupil with the digital camera (B).

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  Figure 2. Comparison of the mean vertical and horizontal diameters of pupils under various illuminance (A: vertical diameter, B: horizontal diameter) (lx: Lux).

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  Figure 3. Statistical comparison of the mean vertical and horizontal diameters of pupils under various illuminance in different age groups (A: vertical diameter; B: horizontal diameter). Values are the mean ± SD. Differences in numeric characteristics within each age group were tested with analysis of variance (ANOVA) with Tukey‐ Kramer post‐ hoc test. Bars with different superscripts (a, b, c, d) represents statistically significant difference from each other within a specific age group (p<0.05).

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  Figure 4. Comparison of the area of the pupil (lx: Lux).

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  Figure 5. Statistical comparison of the mean pupil area under various illuminance in different age groups. Values are the mean ± SD. Differences in numeric characteristics within each age group were tested with analysis of variance (ANOVA) with Tukey‐ Kramer post‐ hoc test. Bars with different superscripts (a, b, c, d) represents statistically significant difference from each other within a specific age group (p<0.05).

Reference

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