目的：了解汕头地区城乡中小学生隐性斜视的患病现况，为防治斜视提供依据。方法：横断面研究，随机整群抽样调查。在汕头地区调查9所城乡中小学校，共7 537人。眼位检查采用33 cm角膜映光法，视远视近遮盖去遮盖与交替遮盖法；记录检查结果并按年级、城乡、不同类型眼位等特征进行归类，统计学方法分析总结。结果：完成调查人数共7 464人，其中男女分别为3 928和 3 536人，平均年龄11岁；本调查人群内、外隐斜视患病率分别为3.08%和60.65%，小学生内隐斜视率高于初中、高中学生内隐斜视率(P<0.001)；高中学生外隐斜视率高于小学、初中学生外隐斜视率(P<0.001)，特别是以高三年级学生外斜视率最高；农村学生的内、外隐斜视率均高于城市学生(P<0.05)；logistic回归模型显示隐斜视率与年龄、性别无明显相关性。结论：首次报道了国内学生 中隐性斜视的分布特点，即内隐性斜视以小学生多，外隐斜视以高中生多，农村学生的隐斜率高于城市学生，可能与中国学生的屈光发育状态有关。

Objective: To investigate the prevalence of heterophoria among urban and rural students in Shantou City of Guangdong Province, China. Methods: Cluster sampling was used in randomly selecting 7 537 students from 9 schools in Shantou City. Ocular alignment was assessed by using the Hirschberg light reflex and cover test. Cover testing was performed by using fixation targets at both distance (6 m) and near (30 cm). Statistical analyses were performed using SPSS statistical software to investigate the association of age, grades and schools and different types of strabismus. Results: A total of 7 464 students were examined  (participation rate was 99.03%), including 3 928 boys and 3 536 girls, mean age 11 years. The prevalence of esophoria and exophoria were3.08% and 60.65%. Esophoria prevalence of primary school students have the signiffcant difference (P<0.001) contrast with middle school students and high school students. And prevalence of exophoria was highest in high school students and significantly higher than middle and primary school students respectively (P<0.001). Heterophoria was more prevalent in rural school students than urban school students(P<0.05). Multivariate logistic regression model indicated that the prevalence of heterophoria had no significant correlation with grades and ages. Conclusion: This survey first reported the prevalence of heterophoria in China. The prevalence of esophoria appears to be higher in primary students and exophoria was highest in high school students; Prevalence of Heterophoria in the population of this survey generally showed higher in rural school students than urban areas. These may be associated with refraction in Chinese students. 

Background: To investigate early change of corneal aberrations after 2.8-mm superior incision phacoemulsification.

Methods: This study comprised 80 eyes of 75 patients. All the patients underwent phacoemulsification with monofocal foldable intraocular lens (IOLs) implanted through a 2.8-mm superior corneal incision. The anterior corneal wavefront aberrations for the 6.0-mm pupillary diameter was measured by iTrace wavefront aberrometer (Tracey Technologies, Inc.) preoperatively and 1 month postoperatively. Changes of root mean square (RMS) values of Z(3, -3), Z(3, 3), Z(3, -1), Z(3, 1), and Z(4, 0) and total high order aberration (HOA) were evaluated.

Results: The uncorrected and corrected visual acuities improve significantly (P<0.001). No significant postoperative changes were observed in spherical aberration (P=0.652). Significant changes in vertical coma and vertical trefoil (0.005±0.214 vs. -0.049±0.242, P=0.037; -0.141±0.222 vs. -0.258±0.359, P=0.001; separately). However, the total HOAs increased after cataract surgery (0.567±0.161 vs. 0.688±0.343, P<0.001).

Conclusions: Corneal vertical coma and vertical trefoil changes significantly in 2.8 mm superior corneal incision phacoemulsification cataract surgery. In addition, those had a trend to negative direction.

Background: To investigate early change of corneal aberrations after 2.8-mm superior incision phacoemulsification.

Methods: This study comprised 80 eyes of 75 patients. All the patients underwent phacoemulsification with monofocal foldable intraocular lens (IOLs) implanted through a 2.8-mm superior corneal incision. The anterior corneal wavefront aberrations for the 6.0-mm pupillary diameter was measured by iTrace wavefront aberrometer (Tracey Technologies, Inc.) preoperatively and 1 month postoperatively. Changes of root mean square (RMS) values of Z(3, -3), Z(3, 3), Z(3, -1), Z(3, 1), and Z(4, 0) and total high order aberration (HOA) were evaluated.

Results: The uncorrected and corrected visual acuities improve significantly (P<0.001). No significant postoperative changes were observed in spherical aberration (P=0.652). Significant changes in vertical coma and vertical trefoil (0.005±0.214 vs. -0.049±0.242, P=0.037; -0.141±0.222 vs. -0.258±0.359, P=0.001; separately). However, the total HOAs increased after cataract surgery (0.567±0.161 vs. 0.688±0.343, P<0.001).

Conclusions: Corneal vertical coma and vertical trefoil changes significantly in 2.8 mm superior corneal incision phacoemulsification cataract surgery. In addition, those had a trend to negative direction.

Background: To report the clinical features of surgically induced scleral staphyloma and investigate the management.

Methods: Retrospective uncontrolled study.

Results: A full ophthalmological evaluation of surgically induced scleral staphyloma in four patients was performed. The first patient was a 3-year-old young girl underwent corneal dermoid resection. The second patient was a 60-year-old man underwent nasal pterygium excision and conjunctival autograft without Mitomycin C (MMC). The other two were respectively a 74-year-old woman and a 69-year-old man underwent cataract surgery. All patients performed allogeneic sclera patch graft. In the at least half a year follow-up, the best corrected visual acuity (BCVA) of all the four patients were no worse than that of preoperative. Ocular symptoms disappeared, including eye pain, foreign body sensation, and so on. Unfortunately, the fourth patient showed sclera rejection and partial dissolution at postoperative 1 month.

Conclusions: Surgically induced scleral staphyloma must be considered in the differential diagnosis of patients with staphyloma following corneal dermoid, pterygium, and cataract surgery. Allogeneic sclera patch graft is one of the methods for treating scleral staphyloma. However sclera rejection and dissolution should be considered postoperatively.

Background: To report the clinical features of surgically induced scleral staphyloma and investigate the management.

Methods: Retrospective uncontrolled study.

Results: A full ophthalmological evaluation of surgically induced scleral staphyloma in four patients was performed. The first patient was a 3-year-old young girl underwent corneal dermoid resection. The second patient was a 60-year-old man underwent nasal pterygium excision and conjunctival autograft without Mitomycin C (MMC). The other two were respectively a 74-year-old woman and a 69-year-old man underwent cataract surgery. All patients performed allogeneic sclera patch graft. In the at least half a year follow-up, the best corrected visual acuity (BCVA) of all the four patients were no worse than that of preoperative. Ocular symptoms disappeared, including eye pain, foreign body sensation, and so on. Unfortunately, the fourth patient showed sclera rejection and partial dissolution at postoperative 1 month.

Conclusions: Surgically induced scleral staphyloma must be considered in the differential diagnosis of patients with staphyloma following corneal dermoid, pterygium, and cataract surgery. Allogeneic sclera patch graft is one of the methods for treating scleral staphyloma. However sclera rejection and dissolution should be considered postoperatively.

Subretinal hemorrhage is a vision threatening complication of exudative age related macular degeneration (AMD) and polypoidal choroidal vasculopathy (PCV). Timely removal or displacement of subretinal hemorrhage from the central macula, ideally within 7 to 10 days after onset, is critical to allowing potential recovery of vision. Surgical techniques with the use of a bubble to displace the subretinal hemorrhage can now be performed with tissue plasminogen activator to lyze the blood and with or without vitrectomy.

Subretinal hemorrhage is a vision threatening complication of exudative age related macular degeneration (AMD) and polypoidal choroidal vasculopathy (PCV). Timely removal or displacement of subretinal hemorrhage from the central macula, ideally within 7 to 10 days after onset, is critical to allowing potential recovery of vision. Surgical techniques with the use of a bubble to displace the subretinal hemorrhage can now be performed with tissue plasminogen activator to lyze the blood and with or without vitrectomy.

报道一例发生在41岁中年女性左眼上睑的无色素性黑色素瘤，曾在当地医院误诊为霰粒肿。体检见左眼上睑结膜面一大小约2 cm × 2 cm红色肿物，手术切除肿物送病理检查，标本经10%福尔马林固定，常规石蜡包埋切片，HE染色及免疫组织化学染色。光镜下见肿瘤细胞呈片状及巢状排列，瘤细胞圆形及梭形，部分瘤细胞胞浆空泡状呈气球样形，部分细胞核仁明显。免疫组化显示肿瘤细胞S-100、HMB-45阳性，CK及EMA阴性，最终病理诊断为左眼上睑无色素性黑色素瘤。对于临床上患者年龄较大无典型霰粒肿特征的眼睑肿物，术后标本均应送病理检查以除外其它肿瘤的可能。

To report a case of amelanotic melanoma located in the leff upper eyelid misdiagnosed as chalazion in a 41-yearold woman. Examination showed a red 2 cm × 2 cm mass in the left upper palpebral conjunctiva. The tumor was excised and regular fixed in 10% formalin, embedded, sectioned, HE stained and immunohistochemistry stained. Histopathological examination revealed nests of round atypical tumor cells with vacuolated cytoplasm and sheets of spindle atypical tumor cells. Some tumor cells had conspicuous nucleoli. Immunohistochemistry some tumor cells were positive for melanocytic markers S-100, HMB-45 and negative for CK, EMA. So the pathological diagnosis was palpebral conjunctiva amelanotic melanoma in the leff upper eyelid. For the mass in palpebral conjunctiva of senile patients without typical characteristics of chalazion, the surgical specimen should be performed for pathologic examination to rule out other tumors.