Roesen B, Gramer E
Universitäts-Augenklinik Würzburg.
Ophthalmologe. 1995 Aug;92(4):564-73.
The GG program pattern of the Humphrey Field Analyzer includes the 76 test points of the 30-2 program and an additional 52 test points in a glaucoma-specific distribution. In 18 test points in the nasal step area beyond 30 degrees the threshold is also determined. The findings obtained with the GG program and the 30-2 program were investigated by means of three questions: (1) Do the additional test points increase the sensitivity in ocular hypertension and glaucoma in stage I? For this purpose 41 eyes of 41 patients were examined. (2) Is the new grid useful for the determination of form and size of scotomas? For this purpose 46 eyes of 46 patients were examined. (3) What information is gained from a new asymmetry index, the glaucoma hemifield index (GHI), evaluated on the retinal threshold sensitivity of the GG program grid? To evaluate the information gained, the GHI of the test points in program 30-2 was compared to the GHI of the GG program in 11 eyes of 11 healthy persons, 21 eyes of 21 patients with ocular hypertension, and 32 eyes of 32 patients with primary open-angle glaucoma, stage I and II.
(1) In ocular hypertension and glaucoma stage I, the higher grid density of the GG program leads to a higher sensitivity in comparison to program 30-2. (2) In the 46 eyes with scotomas in stages II-IV, the condensed grid allowed better assessment of form and size of them. Ninety-one percent of the eyes with glaucoma stage II-IV showed nasal scotomas out of 30 degrees excentricity, which were now detected with the GG program. (3) The GHI of program 30-2 and the GG program showed no significant difference in retinal threshold sensitivity in glaucoma stage I. The asymmetry of the visual field loss in glaucoma stage II with localized scotomas can be detected significantly better with the GHI of the GG program. At the beginning of visual field loss with diffuse sensitivity loss, the grid density of program 30-2 seems to be sufficient. In stage II with localized scotomas, the higher grid density of the GG program yield more information for the detection of hemifield asymmetries. After examination with the 30-2 program it seems to be useful to examine the 52 additional test points and combine these two with the print-out from the GG program.
汉弗莱视野分析仪的GG程序模式包括30-2程序的76个测试点以及青光眼特异性分布中的另外52个测试点。在超过30度的鼻侧阶梯区域的18个测试点中也测定了阈值。通过三个问题对GG程序和30-2程序获得的结果进行了研究：（1）额外的测试点是否提高了I期高眼压症和青光眼的敏感度？为此，对41例患者的41只眼睛进行了检查。（2）新网格对暗点的形态和大小的测定是否有用？为此，对46例患者的46只眼睛进行了检查。（3）从基于GG程序网格的视网膜阈值敏感度评估的新不对称指数——青光眼半视野指数（GHI）中能获得什么信息？为了评估所获得的信息，将30-2程序中测试点的GHI与11例健康人的11只眼睛、21例高眼压症患者的21只眼睛以及32例I期和II期原发性开角型青光眼患者的32只眼睛中GG程序的GHI进行了比较。
（1）在I期高眼压症和青光眼中，与30-2程序相比，GG程序更高的网格密度导致更高的敏感度。（2）在II-IV期有暗点的46只眼睛中，密集网格能更好地评估暗点的形态和大小。91% 的II-IV期青光眼眼睛在30度偏心度外有鼻侧暗点，现在通过GG程序检测到了这些暗点。（3）30-2程序和GG程序的GHI在I期青光眼的视网膜阈值敏感度方面没有显著差异。对于II期青光眼伴有局限性暗点的视野缺损不对称性，使用GG程序的GHI能更显著地检测到。在视野缺损开始伴有弥漫性敏感度丧失时，30-2程序的网格密度似乎就足够了。在II期伴有局限性暗点时，GG程序更高的网格密度能为检测半视野不对称性提供更多信息。在用30-2程序检查后，检查另外52个测试点并将这两者与GG程序的打印结果相结合似乎是有用的。
