原发性开角型和低压性青光眼早期视野及视网膜神经纤维层损害…

探讨原发性开角型青光眼和低压性青光眼早期视野损害及视网膜神经纤维层缺损的特点。

A comparative study of visual field defects between primary open-angle and low tension glaucoma]

OBJECTIVE: To investigate the characteristics of early visual field defects in primary opene-angle glaucoma (POAG) and low tension glaucoma (LTG). METHOD: The visual fields of 41 eyes with early POAG and 15 eyes with LTG were quantitatively measured with QZS-2 automated perimetry (full threshold program). RESULTS: Most of the early glaucomatous visual field defects in POAG and LTG presented the decrease of localized light sensitivity, and a few indicated the decrease of diffuse type. The defect occurred entirely in the central field and in a small number of eyes it was complicated by the peripheral field defect, especially in the nasal field. The differences of the mean light sensitivity and short-term fluctuation in the central field were statistically significant between the early POAG or LTG and the normal control group (all P < 0.05). In the comparisons of the visual field defect and retinal nerve fiber layer defect between early POAG and LTG groups, the results indicated that the types of damage and distribution of the areas involved were not different. CONCLUSION: The characteristics of early visual field defects in POAG and LTG are the same.