Central corneal thickness profile in relation to pediatric cataract morphology.

Several studies have demonstrated that central corneal thickness (CCT) increases in pediatric eyes after cataract extraction with or without intraocular lens (IOL) implantation. This thickening has been hypothesized to be the result of endothelial dysfunction caused by direct trauma during surgery, toxic effects of irrigating fluids, or postoperative inflammation. Limited literature is available regarding the preoperative profile of CCT in pediatric cataract eyes. The purpose of the current study was to evaluate the differences in the mean preoperative CCT in eyes with pediatric cataract related to the presence or absence of persistent fetal vasculature.

Duane-minus (Duane sine retraction and Duane sine limitation): possible incomplete forms of Duane retraction syndrome.

PURPOSE: To report ocular motility patterns that mimic, but do not fulfil the full clinical picture of Duane retraction syndrome (DRS) and to describe their clinical features and surgical management. METHODS: This is a retrospective case series study conducted on patients with DRS, mimicking non-comitant exotropia or esotropia and a face turn. Patients were included only if they lacked either globe retraction on adduction (sine retraction) or limitation of adduction or abduction on ductions (sine limitation not >0.5). Any overshoots or pattern strabismus was recorded. The ocular motility and alignment, details of surgery and their surgical outcomes were analysed. RESULTS: Twenty-one patients were identified; 13 in the sine retraction and 8 in the sine limitation group. All patients presented with a compensatory face turn. Overshoots were present in 10 (77%) and 7 patients (88%) in the sine retraction and sine limitation groups, respectively. Forced duction test showed tightness of the ipsilateral medial and the ipsilateral lateral rectus muscle in esotropic (n = 3) and exotropic patients (n = 18), respectively. Orthotropia was achieved in 82% of patients following ipsilateral medial or lateral rectus muscle recession. CONCLUSIONS: There is a subset of patients who present with motility pattern similar to DRS but lack its complete diagnostic criteria. The presence of a face turn, overshoots on adduction or an ipsilateral tightness of the affected muscle should make one consider DRS sine retraction/sine limitation. The patients in our study responded well to lines of management similar to those of DRS.

Pattern strabismus in consecutive esodeviation after bilateral lateral rectus muscle recession for intermittent exotropia.

PURPOSE: After bilateral lateral rectus recession for intermittent exotropia, children can develop V- or A-pattern esodeviation and adopt a chin-down or chin-up position to facilitate fusion. The aim of this study was to discuss possible causes and management of this pattern. METHODS: The medical records of children who developed consecutive esodeviation with V- or A-pattern strabismus after surgery for intermittent exotropia but with no pre- or postoperative oblique muscle dysfunction were reviewed retrospectively. Ductions, versions, angles of deviation, and fundus torsion were evaluated before and after surgery. Patient management and outcomes were analyzed. RESULTS: A total of 37 patients were identified (mean age, 5.7 ± 1.5 years), with a mean preoperative deviation of 30.6Δ ± 5.2Δ; no patient had a preoperative pattern strabismus. Mean bilateral lateral rectus recession was 6.2 ± 0.9 mm. Of the 37, 34 (89%) returned postoperatively with V pattern, 2 with an A pattern, and 1 with an hourglass-like pattern. No patient showed oblique muscle dysfunction or fundus torsion. Reoperation for the consecutive deviation was performed in 19 patients, in all of whom the lateral rectus muscles were not vertically displaced. The pattern disappeared completely after reoperation and reestablishment of adequate alignment in the primary position. CONCLUSIONS: In our patient cohort, pattern strabismus after bilateral lateral rectus recession was successfully reversed by correction of the consecutive esodeviation.

Evaluation of Corneal Biomechanical Parameters in Psoriasis Patients: A Controlled Study.

PURPOSE: To evaluate corneal biomechanical parameters with an ocular response analyzer (ORA) in patients with psoriasis and compare these parameters with age-matched control subjects. STUDY DESIGN: This was a cross-sectional observational case-control study. METHODS: Thirty eyes of 15 psoriasis patients were included in the study and compared with 30 eyes of 15 control subjects. Corneal biomechanical properties were calculated by ORA. Central corneal thickness (CCT) was measured by anterior-segment optical coherence tomography. The main outcome measures were corneal hysteresis (CH), corneal resistance factor (CRF), corneal-compensated intraocular pressure (IOPcc), and Goldmann-correlated IOP (IOPg). For dry-eye evaluation, Schirmer's test was used. RESULTS: Mean CH in the psoriasis group was 10.20±1.55 mmHg and in the control group 10.66±1.36 mmHg (p=0.215). Mean CRF in the psoriasis group was 9.76±1.60 mmHg and in the control group 10.97±1.42 mmHg (p=0.003). Mean IOPcc in the psoriasis group was 14.84±3.43 mmHg and in the control group 16.67±3.17 mmHg (p=0.035). Mean IOPg in the psoriasis group was 13.92±3.35 mmHg and in the control group 16.62±3.10 mmHg (p=0.002). Mean CCT in the psoriasis group was 543.90±37.27 µm and in the control group 551.23±28.63 µm (p=0.392). Schirmer's test results in the psoriasis group were 11.4±1.57 mm/5 min and in the control group 17.5±1.52 mm/5 min (p<0.001). CONCLUSION: Psoriasis affects corneal biomechanical properties with statistically significantly lower corneal biomechanics than normal. CH correlates negatively with disease activity. These corneal biomechanical changes should be considered when determining IOP values and during corneal evaluation for keratoconus-suspected patients.

Evaluation of Central and Peripheral Corneal Thicknesses in Patients with Systemic Lupus Erythematosus.

PURPOSE: To evaluate the corneal pachymetric and topographic parameters of systemic Lupus Erythematosus (SLE) patients using Dual Scheimpflug Imaging. METHODS: This observational cross-sectional controlled study included the right eye of 30 SLE patients and 30 age-matched controls. Corneal measurements were acquired by dual Scheimpflug imaging including anterior and posterior corneal curvatures, central, mid-peripheral corneal thickness (measured at the 5 mm zone) and peripheral pachymetry (measured at the 7 mm zone). SLE disease activity index (SLEDAI) was calculated and correlated with corneal pachymetry. RESULTS: SLE patients had significantly thicker corneal periphery than controls. Mean central corneal pachymetry was 530.4± 27.3 microns (SD) in SLE and 547.5±31.5 microns (SD) in control group, p = 0.032. The corneal periphery - except superiorly - was significantly thicker in SLE patients than controls (p ˂0.001). Nasal peripheral corneal thickness positively correlated with disease activity index SLEDAI (p=0.03). CONCLUSION: SLE patients present with thicker corneal periphery than controls characteristically sparing the superior quadrant. Possible corneal photosensitivity leading to peripheral immune complex deposition as well as flatter posterior corneal surface at the periphery are proposed explanations for these findings.

Assessment of superficial and deep retinal vessel density in systemic lupus erythematosus patients using optical coherence tomography angiography.

PURPOSE: The aim of this study is to evaluate the retinal microvascular density in SLE patients using optical coherence tomography angiography (OCTA) and to correlate vascular density with the disease activity and damage risk. METHODS: Twenty eyes of 20 SLE patients were compared with 20 eyes of normal subjects. The retinal capillary plexuses were examined by OCTA. The disease activity and damage risk were evaluated by the SLEDAI-2 K and SLICC/ACR SDI scoring systems. RESULTS: No difference was found between SLE patients' central foveal thickness (CFT) and foveal avascular zone (FAZ) area and the normal (P > 0.05). SLE patients had slightly lower superficial vessel densities than normal in the upper and lower macular regions (P < 0.05), sparing the middle sectors (P > 0.05). In the deep plexus, vessel density loss was detected in all sectors (P < 0.001). The vessel density in 300-µm-wide region around the FAZ (FD-300) and the acircularity index (AI) were affected in the SLE in comparison to the normal group (P < 0.05). No significant correlation was found between the SLEDAI-2 k and the retinal vessel density in either layer, while the SLICC/SDI had moderate inverse correlation with vessel density in some sectors (P < 0.05). Receiver operating characteristic (ROC) curve analysis showed that the deep capillary plexus had high sensitivity and specificity for detecting vascular damage in SLE patients. CONCLUSIONS: OCTA permits noninvasive quantitative assessment of retinal vessel density in SLE, allowing early detection of altered retinal circulation. Vessel density could be included in future assessment of SLE activity and damage scores.

Outcomes and Complications Rate of Resident versus Attending Performed Eye Muscle Surgeries.

Purpose: to compare the type, complications rate, and success rate of eye muscle surgeries performed by residents to those performed by attending consultants. Methods: A retrospective review was done on the charts of all children who underwent an eye muscle surgery in Cairo University Hospital during the period from January 2015 to December 2017. Preoperative data including age, sex, and type of deviation were tabulated. Details of the operative procedure including the surgeon, the type of eye muscle surgery, the number of muscles operated upon, perioperative complications, and the final ocular alignment at the end of the third month after surgery were recorded. Results: A total of 319 patients were included; 143 patients (315 muscles) in the supervised resident group and 176 patients (387 muscles) in the attending group. More vertical and oblique muscles surgeries were done by the attending consultants than by residents. Surgical success after three months was higher in the attending group (n = 126, 72%) than the resident group (n = 91, 64%). However, the difference was not statistically significant (P = .129). The perioperative complications rate was significantly higher (P = .004) in the resident group (14%) than the attending group (6%). Accidental scleral perforation was the most commonly encountered complication in the resident group (n = 6, 1.9%) followed by extruded/exposed Tenon (n = 5, 1.6%), and muscle slippage (n = 4, 1.3%). Conclusions: Success rate is similar in eye muscle surgeries performed by residents and attending consultants. However, perioperative complications are still more common among residents.