To evaluate the normal range of intraocular pressure of Koreans, the authors performed the tonometry upon 376 individuals who visited to the department of ophthalmology, Medical college, Ewha Womans´University without known glaucoma with the Schi6tz tonometer and the data. were analized.
To verify the effect of the scleral rigidity upon the intraocular pressure, indentation & applanation tonometry were performed respectively upon normal persons and the values were also compared.
In order to speculate the interrelationships among intraocular pressure, blood pressure and. central retinal arterial pressure, tonometry, sphygmomanometry & ophthalmodynamometry were carried out upon 15 normal persons respectively, and the data were computed.
The results are as follows
1. The mean value of the normal intraocular pressure of 376 Koreans (752eyes) is 16.2mmHg and their major distributions are in the range of 10. 1-20. OmmHg (83.8%).
2. The mean value of the intraocular pressure of 25 normal subjects measured with the Schiotz: tonometer is 15. 3mmHg and that measured with the applanation tonometer is 14.7mmHg respectively, but there is no statistical significance between the two groups (PCO. 01).
3. The mean value of the intraocular pressure of 15 hypertensive patients measured with the Schi6tz tonometer is 15.5mmHg and that measured with the applanation tonometer is also. 15. 5mmHg and in the control group, the former is 15.1mmHg and the latter is 14.4mmHg. But there is no statistical significance also between the two groups (P>0.01).
4. The mean diastolic pressure of the central retinal artery of 25 normal subjects is 38. lmmHg and the systolic pressure of those is 84.5mmHg. According to references, the diastolic pressure of the central retinal artery is 20-70mmHg and the systolic pressure of that is 60-130mmHg. There seem to be no great differences in our values from that previously reported one.
5. The mean diastolic pressure of the central retinal artery of 15 hypertensive patients is 54. 4 mmHg and that of systolic pressure is 121. lmmHg. But in the control group, the former is 37. 2mmHg and the later is 85. OmmHg. There is statistical significance between the two groups (P<0.01). So far as the intraocular pressure is concern, no significant differences between the normal subjects and the hypertensive patients.
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