ObjectiveTo observe and analyze the fundus of pregnancy-induced hypertension syndrome (PIHS) and optical coherence tomography (OCT) characteristics and its correlation with ocular symptoms and degree of the systemic disease. MethodsA total of 132 PIHS patients (264 eyes) received the examinations of corrected visual acuity, slit lamp microscope, direct ophthalmoscope, OCT and fundus color photography after obtaining informed consent in the study. There were 10 cases of gestational hypertension, 29 cases of preeclampsia (mild), 82 cases of pre-eclampsia (severe) and 11 cases of eclampsia. 91 patients (180 eyes) felt blurred vision and visual fatigue. 102 patients were examined at an average gestational age of (37.00±2.14) weeks and 30 patients were examined at an average (10.00±8.22) days postpartum. The ocular fundus was divided into normal fundus and abnormal fundus; the abnormal fundus had 3 stages, including stageⅠ(retinal arterial spasm), stageⅡ(retinal arteriosclerosis) and stageⅢ(retinopathy). If the OCT results seems to be abnormal, these patients were further selected to observe the changes of neurosensory serous retinal detachment, retinal pigment epithelium (RPE) and junction of inner and outer segment of photoreceptor (IS/OS). Kappa test was used to analyze the consistency between fundus performance and OCT results, and that of ocular symptoms with fundus changes and OCT results. Rank correlation test was used to analyze the degree of PIHS and OCT examinations. ResultsThere were 32 eyes with normal fundus (12.12%) and 232 eyes with abnormal fundus (87.88%). The 232 eyes with abnormal fundus were divided into three stages: stageⅠfor 16 eyes (6.90%), stageⅡfor 31 eyes (13.36%) and stageⅢfor 185 eyes (79.74%). 92 of 264 eyes (34.85%) had normal OCT findings, 172 eyes (65.15%) were abnormal, including 94 eyes with serous retinal neurosensory detachment (54.65%), 40 eyes with changes of RPE and IS/OS (23.26%) and 38 eyes with other manifestations (22.09%). Kappa test analysis showed highly consistency between OCT results and ocular symptoms (K=0.728, Po=0.591), and poor consistency between fundus abnormalities and ocular symptoms (K=-0.129, Po=0.879), and between fundus abnormalities and OCT results (K=0.174, Po=0.682). OCT results were positively correlated with the degree of PIHS (C=0.374, χ2=74.011; P=0.000). Conclusions87.88% of PIHS eyes had various degrees of retinal hemorrhage, cotton wool spots, retinal bumps or detachment, optic disc edema and other retinal abnormalities. 65.15% of that showed OCT abnormal results such as neurosensory retinal detachment, cystoid edema, RPE changes etc. The consistency was poor between the OCT results and fundus abnormalities. OCT results are positively correlated with the degree of PIHS.
ObjectiveTo observe the contrast sensitivity (CS) of patients with branch retinal vein occlusion (BRVO) without involving the macular region. Methods92 BRVO patients (93 eyes) and 56 cases (112 eyes) without eye diseases (control group) were included in the study. According to different region, BRVO patients were divided into the nasal BRVO group (31 eyes) and temporal BRVO (62 eyes) group, and the average corrected visual acuity was 1.02±0.13 and 0.98±0.12 respectively. According to the type of ischemia, BRVO patients were divided into the nonischemic BRVO group (58 eyes) and ischemic BRVO group (35 eyes), the average corrected visual acuity was 1.01±0.14 and 0.99±0.12 respectively. The average corrected visual acuity of the control group was 1.03±0.11. There was no statistically significant difference of the average corrected visual acuity between nasal BRVO group, temporal BRVO group and control group (F=3.03, P=0.06), and between nonischemic BRVO group, ischemic BRVO group and control group (F=1.60,P=0.20). Contrast sensitivity (CS) was measured by OPTEC 6500 vision tester (Stereo Company, USA) under the standard lighting conditions and different spatial frequencies including low (1.5 and 3.0 c/d), medium (6.0 c/d) and high frequencies (12.0 and 18.0 c/d). ResultsThe CS under each spatial frequency of the nasal BRVO group was the same as the control group (t=4.25, 9.48, 3.08, 5.86, 0.94; P>0.05), but the CS under each spatial frequency of the temporal BRVO group was different from the control group (t=8.59, 19.11, 10.38, 17.28, 6.01; P<0.05). The CS under high spatial frequency of the temporal and nasal BRVO group was statistically different (t=11.42, 6.95; P<0.05). The CS under each spatial frequency of the ischemic BRVO group was different from the control group (t=8.88, 10.56, 11.64, 19.06, 6.67; P<0.05).The CS under 6, 12 and 18 c/d spatial frequency of the nonischemic BRVO group was statistically different with the control group (t=10.14, 11.54, 2.82; P<0.05). The CS under 12 and 18 c/d spatial frequency of the nonischemic BRVO group was statistically different with the ischemic BRVO (t=7.52, 3.84; P<0.05). ConclusionsThe CS of the temporal BRVO and ischemic BRVO decreased more significantly under each spatial frequency. CS is a better indicator to evaluate the visual function than the visual acuity in BRVO without involving the macular region.