Khan Faisal Aziz, Ishaq Mazhar, Yaqub Amer
Department of Ophthalmology, Combined Military Hospital, Malir Cantt, Karachi.
Department of Ophthalmology, Armed Forces Institute of Ophthalmology, Rawalpindi.
J Coll Physicians Surg Pak. 2017 Mar;27(3):140-144.
To compare the long- and short-term fluctuations of frequency doubling technology perimetry between peripheral and paracentral zone and determine the relationship between threshold sensitivity and long- and short-term fluctuation within peripheral and paracentral zone of visual field.
Descriptive study.
Eye Department, United Nations, Pakistan Field Hospital Level-3 Darfur, Sudan, from February to July 2015.
Normal eyes of 30 volunteers were recruited. Frequency doubling technology perimetry, program N-30, full threshold was employed. Each subject was tested at weekly intervals, once in the 1st, 3rd and 4th sessions and three times in the 2nd session. Visual field was divided into paracentral, superior, and inferior zones. Short-term and long-term fluctuation as well as threshold sensitivity were calculated for each patient as the mean fluctuation and mean sensitivity value. Mann-Whitney U-test was used to compare each zone in terms of their short- and long-term fluctuations and Spearman's rho correlation test for determining the relationship of threshold sensitivity with short- and long-term fluctuations.
Long-term fluctuation values differences were insignificant between superior and paracentral zones. Short-term fluctuation values were statistically insignificant between all three zones. Short-term fluctuation and threshold sensitivity in each zone did not correlate. Long-term fluctuation and threshold sensitivity had a very weak negative, statistically insignificant correlation in superior and paracentral zones.
Frequency doubling perimetry exhibits uniform short- and long-term fluctuations in peripheral and paracentral zones of visual field in normal subjects. Threshold sensitivity and long- and short-term fluctuations are independent of each other in peripheral and paracentral zones of visual field.
比较倍频视野计在周边区和旁中心区的短期和长期波动情况，并确定视野周边区和旁中心区阈值敏感度与短期和长期波动之间的关系。
描述性研究。
2015年2月至7月，苏丹达尔富尔三级巴基斯坦野战医院联合国眼科部。
招募30名志愿者的正常眼睛。采用倍频视野计，程序N-30，全阈值。每位受试者每周进行一次测试，第1、3和4次测试各进行一次，第2次测试进行三次。视野分为旁中心区、上方区和下方区。计算每位患者的短期和长期波动以及阈值敏感度，作为平均波动和平均敏感度值。采用曼-惠特尼U检验比较各区域的短期和长期波动情况，并采用斯皮尔曼等级相关检验确定阈值敏感度与短期和长期波动之间的关系。
上方区和旁中心区之间的长期波动值差异无统计学意义。所有三个区域之间的短期波动值差异无统计学意义。每个区域的短期波动和阈值敏感度无相关性。上方区和旁中心区的长期波动与阈值敏感度呈非常弱的负相关，差异无统计学意义。
在正常受试者中，倍频视野计在视野周边区和旁中心区呈现出一致的短期和长期波动。视野周边区和旁中心区的阈值敏感度与短期和长期波动相互独立。
