Value of intraocular pressure in myopic people and its associated factors

Objective To investigate the value of intraocular pressure in myopic people and the related factors. Methods The data of 3 325 fight eyes in 3 325 myopic patients and 277 cases with anisometropia in both eyes was achieved and analyzed with t - test, variance, and statistics of relativity. The analysis was done by SAS 8.0 software to get the mean value and their correlations. The investigation includes gender, age, sex, CCT( central corneal thickness), diopter, IOP (intraocular, measured by non-contact tonometer), curvature of cornea and axisoculi ength. Results The mean value of Lop was (16.2±2.7)mm Hg(1 mm Hg=0.133 kPa) ;the mean value of CCT was(541±28) μm,IOP was related with CCT,the coefficient r=0. 4768 ;the mean value of curvature of cornea was(44.52±1.11) D,which was related with IOP and curvature of cornea,the coefficient r=0.1010. The IOP was becoming low with the age increasing. When the age≤20, the mean value of IOP was (16.5±2.9)mm Hg;the age was 21-29, the mean value of IOP was (16.2±2.8)mm Hg; the age was 31-40, the mean value of IOP was (16.1±2.8)mm Hg. Statistiee difference appeared in the analysis of variance with the 3 groups (F=4.4996, P=0.0112 ). IOP will go up with the increase of diopter, diopter≤3.00 D,the mean value of Lop was(16.±2.9) mm Hg;diopter 3.25-6.00 D,the mean value of Lop was (16.2≤2.9) mm Hg; diopter 6.25-9.75 D, the mean value of Lop was (16.5≤2.8)mm Hg; diopter 10.00 D,the mean value of IOP was(16.8≤2.8)mm Hg. Statistice differenc appeared in the analysis of variance with the 4 groups (F=19.6636, P=0.0001). There was not associativity between the value of intra ocular pressure in myopic people and axis oculi,scx, Lop in myopic which had anisometropia in both eyes was idem(P=0.5637) ,There was no statistic difference.Conclusion The mensure of IOP is associated with CCT and curvature of cornea. Intraocular tension is becoming low with the age increasing. Intraocular will go up with the increase of diopter, Lop is not related with axis oculi, and sex. IOP is not different in both eyes with anisometropia. Key words: Intraocular pressure; Central corneal thickness; Diopter; Myopia