[The analysis of various extent visual field defect in chronic glaucoma patients].

PURPOSE: To study the situation for the follow eye visual field defect of patients with severe visual field loss in 1 eye from chronic glaucoma,and to analyze the relative risk factors for visual field defect in such eyes.

METHODS

The visual field defect scores of fellow eyes were calculated in 47 cases [primary chronic angle-closed glaucoma (PACG) 23 cases and primary open angle glaucoma (POAG) 24 cases] with severe visual field loss in 1 eye (visual field defect score > or = 12). The relations were analyzed between the visual field defect scores of fellow eyes and the visual acuity,the maximal and the mean intraocular pressure (IOP), ages, refraction, diagnosis, the last periods of glaucoma, gender and the anti-glaucoma surgery history. Spearman correlation analyse was used to estimated the correlation between the visual field defect scores of fellow eyes and the above factors.

RESULTS

In the fellow eyes of the 23 cases PACG, 4 cases showed no visual field defect (score 0),5 cases showed the mild visual field defect (score 1-5), 7 cases showed the moderate visual field defect (score 6-11), 7 cases showed the severe or end-stage visual field defect (score 12-20). In the fellow eyes of the 24 cases POAG, 4 cases showed the mild visual field defect (score 1-5), 9 cases showed the moderate visual field defect (score 6-11), 11 cases showed the severe or end-stage visual field defect (score 12-20). The visual field defect score of fellow eyes in the last periods more than or equal to 10 years PACG group was significantly larger than that in the last periods less than 10 years PACG group (Z=2.8380, P=0.0224). The visual field defect score of fellow eyes in the mean IOP more than 18 mmHg PACG group was significantly larger than that in the mean IOP less than or equal to 18 mmHg PACG group (Z=1.9174, P=0.0276). The visual field defect score of fellow eyes in the anti-glaucoma surgery history POAG group was significantly larger than that in the non-anti-glaucoma surgery history POAG group (Z= 2.2377, P=0.0252). The significant positive correlation was found between the visual field defect scores and the mean IOP of the fellow eyes in the PACG group (r=0.4763, P= 0.0216),and the significant negative correlation was found between the visual field defect score and the visual acuity of the fellow eyes in the PACG group (r=-0.4416, P= 0.0349).

CONCLUSION

Among the PACG with severe visual field loss in 1 eye, the visual field defect extent in the fellow eyes was related to the mean IOP, the last periods of PACG and the visual acuity of the fellow eyes. The visual field defect score was positively correlated with the mean IOP, and negatively correlated with the visual acuity of the fellow eyes.