Ophthalmology Journal News


Welcome to the Ophthalmology Journal News page! This page will showcase the latest news from the world of Ophthalmology, as published by The British Journal of Ophthalmology (BMJ).

For the British Ophthalmology Journal Archives, please visit http://bjo.bmj.com/ .

These news items are mainly specific study results that are relevant to the layman.

We have also added another news page with more ‘general’ Opthalmogy news here: Opthamologist News.

Furthermore, we have added a page with general news articles about Eye Health here:  Eye Problems Articles  , which is a good read for both patients and Ophthalmologists alike.

Enjoy!

Ophthalmology Journal News:

In vitro experiment to elucidate the mechanism of the 'soft shell technique for preventing subretinal migration of perfluoro-octane
Aim

Perfluorocarbon liquid (PFCL) can migrate into subretinal space in detached and stiffened retina with open holes during vitreoretinal surgery. An innovative ‘soft shell’ technique was introduced to reduce the complication using hyaluronate (HA) to ‘cover’ the retinal hole. This study aims to study the effectiveness of this technique in vitro.

Methods

Ex vivo porcine retina was mounted on a transwell insert. Beneath the retina was an aqueous solution. Two retinal holes were made using needle punctures. One of the two retinal holes was covered with HA. Perfluoro-n-octane (PFO) was added above the retina incrementally using a syringe pump. The height of PFO required to cause the migration of PFO through the retinal holes was measured. The ‘pendant drop’ method was carried out to measure the interfacial tensions between the PFO and aqueous, and between PFO and four different concentrations of HA solution.

Results

A statistically higher PFO level was required to cause the migration of PFO through the retinal hole with HA coating than without HA coating (Tobit regression with p<0.05). The use of HA was associated with 2.39-fold increase in hydrostatic pressure before the collapse of the PFO interface at the retinal holes. The interfacial tension between PFO and HA solution with concentrations of 0.05%, 0.25%, 0.5% and 1% were 54.2±0.6, 55.3±0.6, 59.5±1.5 and 68.3±1.3 mN/m, respectively (mean±SD). The interfacial tension between PFO and aqueous with 1% HA coating (68.3±1.3 mN/m) was significantly higher than that without (37.4±3.4 mN/m) (p<0.05).

Conclusions

The interfacial tension between HA and PFO is higher than that between aqueous and PFO. This is a plausible physical explanation of how the ‘soft shell’ technique might work to prevent subretinal migration of PFCL.

Author: Chan, Y. K., Lu, Y., Czanner, G., Wu, J., Cheng, H. C., Hussain, R., Sakamoto, T., Shum, H. C., Wong, D.
Posted: February 22, 2017, 10:15 am
T-shaped macular buckling combined with 25G pars plana vitrectomy for macular hole, macular schisis, and macular detachment in highly myopic eyes
Objective

To report our experience using the T-shaped macular buckle (MB) with or without pars plana vitrectomy (PPV) as primary surgery or with a previous failed surgical approach in patients affected by high myopia and macular hole (MH) with or without macular detachment and with or without macular schisis. The primary goal was to evaluate complete closure of the MH and reattachment of the retina.

Design

Retrospective case series of 21 consecutive patients who underwent T-shaped MB implant alone or combined with PPV at the Academic Medical Center in Amsterdam, The Netherlands, between January 2013 and November 2014. The mean axial length was 31.22 mm. The mean follow-up period was 7 months.

Results

Retinal reattachment was achieved in 100% of cases while MH closure was achieved in 90.5%. No major perioperative complications were observed. Best corrected visual acuity improved in 71.4% of patients.

Conclusions

MB combined with PPV should be considered as the preferred surgical approach both in primary and recurrent retinal detachment secondary to MH in high myopic eyes.

Author: Mura, M., Iannetta, D., Buschini, E., de Smet, M. D.
Posted: February 22, 2017, 10:15 am
Internal limiting membrane translocation for refractory macular holes
Background/aims

Closure is more difficult to achieve in macular holes that remain open following a previous unsuccessful pars plana vitrectomy (PPV). We present our results with the internal limiting membrane (ILM) translocation technique that is used to optimise outcomes in refractory macular holes.

Methods

A prospective, interventional, case series was conducted. 12 eyes of 12 consecutive patients with incomplete sealing of the macular hole (open and type 2 closure) after a previous PPV with ILM peeling were included. Measured baseline parameters included best-corrected visual acuity (BCVA) and macular hole smallest diameter, base diameter and height. Surgeries were performed by harvesting a fragment of the ILM near the vascular arcades and subsequently placing it inside the hole. Postoperative measured outcomes included macular hole status, foveal contour, outer retina integrity, BCVA and surgery-related complications.

Results

Anatomic closure occurred in 11 of 12 eyes (91%). This technique elicited a statistically significant improvement in BCVA (p=0.008). Mean BCVA was 20/400 at study baseline and 20/160 at final follow-up. However, less than 16.7% of cases had a final BCVA of ≥20/63.

Conclusion

The ILM translocation technique seems to facilitate persistent idiopathic macular hole closure, where primary surgery with PPV and ILM peeling failed.

Author: Pires, J., Nadal, J., Gomes, N. L.
Posted: February 22, 2017, 10:15 am
Prevalence and risk factors for epiretinal membrane: the Singapore Epidemiology of Eye Disease study
Aim

To examine prevalence and risk factors of epiretinal membrane (ERM) in a large, contemporary, multiethnic Asian population.

Methods

Combined analysis of three population-based studies of eye diseases, with a total of 9799 Chinese, Malays and Indians residing in the general communities of Singapore. A comprehensive ophthalmic examination, interviews and laboratory blood tests were performed to assess potential risk factors. Digital retinal photographs were used to assess ERM according to a standardised protocol. ERM was classified into cellophane macular reflex (CMR) and/or preretinal macular fibrosis (PMF), and also as primary or secondary (in eyes with other retinal pathology or a history of cataract surgery).

Results

The age-standardised and ethnicity-standardised prevalence was 12.1% for any ERM, 6.8% for CMR, 6.7% for PMF and 2.8% for bilateral ERM. ERM prevalence was higher in Chinese (13.0%) compared with Malays (7.9%) or Indians (8.7%). In multivariate analysis, significant factors associated with primary ERM were older age (OR 1.08 per year increase; p<0.01), Chinese ethnicity (OR 1.60 vs Indians; p<0.01; OR 1.39 vs Malays; p<0.01), smoking (OR 0.70; p=0.01), longer axial length (OR 1.07 per mm increase; p=0.03) and cataract (OR 0.64; p<0.01). Significant factors independently associated with secondary ERM were older age (OR 1.05; p<0.01), cataract surgery (OR 10.6; p<0.01) and diabetic retinopathy (OR 2.48; p<0.01).

Conclusions

ERM is common in Asians, particularly among Chinese. Older age is the most consistent risk factor for any ERM, and previous cataract surgery and diabetic retinopathy are the strongest risk factors for secondary ERM.

Author: Cheung, N., Tan, S.-P., Lee, S. Y., Cheung, G. C. M., Tan, G., Kumar, N., Cheng, C.-Y., Wong, T. Y.
Posted: February 22, 2017, 10:15 am
Choroidal structure in eyes with drusen and reticular pseudodrusen determined by binarisation of optical coherence tomographic images
Purpose

To compare luminal and stromal area of the choroid in eyes with drusen and reticular pseudodrusen (RPD) and to investigate their changes over 24 months.

Methods

In eyes with drusen and RPD and control subjects, total choroidal, luminal and stromal area were measured on optical coherence tomography B-scans converted to binary images, at baseline and after 24 months.

Results

Eighteen eyes of 18 subjects for each group were included. In drusen and RPD, we found reduction of mean total choroidal (p=0.0005 and p<0.0001, respectively), luminal (p=0.003 and p<0.0001, respectively) and stromal area (p=0.007 and p=0.0002, respectively) from baseline to month 24; no change of ratio between luminal–stromal and the choroidal area was recorded. Mean luminal, stromal and total choroidal areas were reduced in RPD, as compared with drusen and controls at both baseline and month 24 (p<0.05 for all). In RPD, the stromal area was more represented, as we found lower mean ratio of luminal and total choroidal area compared with drusen and control at both baseline and month 24 (p<0.05 for all).

Conclusions

Mean total choroidal, luminal and stromal area decreased over 24 months similarly in eyes with drusen and RPD. Mean total choroidal, luminal and stromal area were more reduced in eyes with RPD, as compared with eyes with drusen and controls; however, stromal area was more represented in eyes with RPD suggesting a possible role of choroidal vascular depletion and fibrotic replacement in the pathogenesis and disease progression.

Author: Corvi, F., Souied, E. H., Capuano, V., Costanzo, E., Benatti, L., Querques, L., Bandello, F., Querques, G.
Posted: February 22, 2017, 10:14 am
Incidence of optic canal fracture in the traumatic optic neuropathy and its effect on the visual outcome
Objective

To correlate the intraoperative endoscopic findings with high-resolution CT (HRCT) for the diagnosis of optic canal fractures (OCF). To compare the visual outcome of patients with different types of OCF and without.

Design

A retrospective, comparative case series.

Participants

1275 consecutive patients (1275 eyes) with indirect traumatic optic neuropathy (TON).

Methods

Altogether, 1275 patients who underwent endoscopic transethmoid optic canal decompression (ETOCD) for unilateral indirect TON were reviewed from 1 October 2006 to 30 September 2014. HRCT performed prior to surgery were compared with findings during surgery. The visual outcomes before and after surgery were also compared.

Main outcome measures

The presence and type of OCF detected by HRCT and during surgery; visual acuity prior to surgery and at 3 months after surgery.

Results

A total of 1275 patients (1275 eyes) were included, with 708 patients that had OCF visible on HRCT image. During surgery, an additional 187 (20.9%) patients with OCF were noticed. Among these, 136 had undisplaced fractures, most of which were linear intracanalicular fractures. The initial visual acuity of patients with OCF was worse than that of patients without OCF (p<0.01). However, no statistical difference existed in the final visual acuity at 3 months after surgery (>0.05). Significant statistical difference of surgical efficacy existed between all the patients with OCF and without OCF (p<0.001).

Conclusions

Among patients with OCF, 20.9% were not detected by HRCT. Patients with OCF had a worse initial visual acuity than those without OCF. There was no significant difference in final visual acuity after ETOCD.

Author: Yan, W., Chen, Y., Qian, Z., Selva, D., Pelaez, D., Tu, Y., Wu, W.
Posted: February 22, 2017, 10:14 am
Treatment of severe chronic ocular graft-versus-host disease using 100% autologous serum eye drops from a sealed manufacturing system: a retrospective cohort study
Background/Aims

To analyse patients with chronic ocular graft-versus-host disease (GvHD) under treatment with 100% autologous serum eye drops from a sealed manufacturing system.

Methods

17 patients with chronic ocular GvHD received 100% autologous serum eye drops from single use vials manufactured in a sealed system. Retrospective analysis included visual acuity, corneal staining, frequency of artificial tears, ocular symptoms by means of a questionnaire and information on subjective side effects and cost compensation.

Results

Data of prior to autologous serum eye drops therapy and at a 6-month follow-up were obtained. They demonstrated a significant increase in visual acuity (logMAR oculus dexter/right eye (OD) 0.5±0.32 to 0.4±0.3; oculus sinister/left eye (OS) 0.6±0.35 to 0.3±0.35; p=0.177/0.003) and significant improvement in corneal staining (Oxford grading scheme: OD from 3±1.03 to 2±1.43, OS from 4±1.0 to 2±1.09, p=0.004/0.001) and ocular symptoms (ocular surface disease index: 88±20.59 to 63±22.77; p=0.02). Frequency of artificial tears was reduced and no side effects were reported. Patient satisfaction was 100%, and cost compensation by health insurance reached 80%.

Conclusions

100% autologous serum eye drops using a sealed manufacturing system were efficient in improving the ocular surface, patient symptoms and visual acuity without side effects. It seems to be safe to use 100% autologous serum despite earlier suspicions regarding immune complex accumulations and exacerbation of ocular surface inflammation. The potential effects of serum levels of systemic immunosuppressives through readministration onto the ocular surface need to be elucidated.

Author: Tahmaz, V., Gehlsen, U., Sauerbier, L., Holtick, U., Engel, L., Radojska, S., Petrescu-Jipa, V.-M., Scheid, C., Hallek, M., Gathof, B., Cursiefen, C., Steven, P.
Posted: February 22, 2017, 10:14 am
In vivo confocal microscopy evaluation of ocular and cutaneous alterations in patients with rosacea
Aims

The physiopathology of rosacea and the correlation between ocular and cutaneous rosacea remains unclear. This study analysed ocular and cutaneous rosacea with in vivo confocal microscopy (IVCM).

Methods

Thirty-four eyes of 34 patients with confirmed rosacea-associated meibomian gland dysfunction-related evaporative dry eye were enrolled in the study. The ophthalmological investigations included dry eye ocular surface disease index (OSDI), the Schirmer test, tear osmolarity, tear break up time, the Oxford score, infrared meibography for meibomian gland (MG) analysis and IVCM investigation for cornea, MG and skin analysis (cheek, hand). Presences of Demodex in the MG and in the cheek were also investigated. We established scores for quantifying the MG alterations in the MG (IVCM-MG) and cheek (IVCM-Cheek), and scores for Demodex quantification in the MG and cheek (IVCM-MG-Dex and IVCM-Cheek-Dex).

Results

IVCM was relevant for analysing the cornea and MG structures and was also suitable for cutaneous analysis. Exposed skin explorations presented the epidermal and dermal layers clearly. In patients with rosacea, the IVCM-MG alteration scores were correlated with IVCM-Cheek (R2=0.27 and p=0.0006) and IVCM-MG-Dex was correlated with IVCM-Cheek-Dex (R2=0.70 and p<0.0001). However, no correlation was found between the IVCM-MG or IVCM-Cheek and the break up time, Schirmer, Oxford and osmolarity evaluations.

Conclusions

IVCM could be a safe, effective and reliable tool to quantify alterations of the cornea, MG and cheek glands in patients with rosacea combined with quantification of Demodex infections. As a valuable tool for investigating the pathophysiology of the disease, it could be used to assess the effectiveness of therapy.

Author: Liang, H., Randon, M., Michee, S., Tahiri, R., Labbe, A., Baudouin, C.
Posted: February 22, 2017, 10:14 am
Clinical implications of serum IgG4 levels in patients with IgG4-related ophthalmic disease
Aims

The present study aimed to investigate the clinical implications of serum IgG4 levels in patients with IgG4-related ophthalmic disease (ROD).

Methods

The medical records of 31 patients who met the diagnostic criteria for IgG4-ROD were retrospectively reviewed. Twenty-five patients whose serum IgG4 levels could be identified were included. Clinical manifestations and serum IgG4 levels before and after corticosteroid treatment were obtained. Factors associated with relapse were evaluated by comparing the features of patients with disease relapse with those of patients without relapse.

Results

Twenty-four patients were ‘definite’ and one was ‘probable’ for IgG4-ROD according to the diagnostic criteria. Serum IgG4 levels were higher in patients with systemic involvement (p=0.046). All patients improved clinically after corticosteroid treatment. Serum IgG4 levels decreased after steroid treatment (p=0.005) and normalised in nine patients. In cases of relapse, serum IgG4 levels increased along with the aggravation of symptoms (p=0.047). Serum IgG4 levels that were still elevated (≥135 mg/dL) after steroid treatment (p=0.034) and cessation of steroid treatment during disease remission (p=0.043) were predictive factors for IgG4-ROD relapse.

Conclusions

Serum IgG4 level can be considered an adjunctive marker for treatment response in IgG4-ROD. Patients with serum IgG4 levels that remain elevated after steroid treatment should be carefully observed for relapse. A continuing maintenance dose of oral steroid is recommended to prevent relapse, even when clinical remission is achieved.

Author: Woo, Y. J., Kim, J. W., Yoon, J. S.
Posted: February 22, 2017, 10:14 am
Longitudinal comparison of femtosecond-assisted sub-Bowman keratomileusis versus photorefractive keratectomy for high myopia
Purpose

To longitudinally compare the visual and refractive outcomes and changes in corneal thickness between femtosecond-assisted sub-Bowmen keratomileusis (SBK) and photorefractive keratectomy (PRK) with mitomycin C in eyes with high myopia.

Methods

Patients with spherical equivalent ≥6 dioptres (D) who underwent femtosecond-assisted SBK or PRK with mitomycin C were recruited. All patients were examined preoperatively and after 1 week, and, 1, 3, 6 and 12 months postoperatively. Assessments included uncorrected and best-corrected distance visual acuity , and manifest refraction spherical equivalent. Corneal thickness was measured using swept source optical coherence tomography.

Results

A total of 110 eyes were included (68 PRK, 42 SBK). Change in efficacy index and safety index was not significantly different between both groups beyond 1 week postoperatively (p≥0.116). Manifest refraction spherical equivalent changed significantly from –9.02±1.92 D preoperatively to –0.21±0.31 D and from –8.25±1.10 D preoperatively to –0.53±0.55 D at 1 year after PRK and SBK, respectively (p<0.0001). The variance of postoperative refraction was significantly smaller after PRK throughout the 1-year follow-up compared with SBK (p≤0.0024). The central corneal thickness stabilised at 1 week after PRK and 3 months after SBK.

Conclusions

Our study showed that femtosecond-assisted SBK and PRK with mitomycin C have comparable safety and efficacy for correction of high myopia. However, better predictability of postoperative refraction was noted after PRK compared with SBK.

Author: Chan, T. C. Y., Yu, M. C. Y., Mak, S., Jhanji, V.
Posted: February 22, 2017, 10:14 am

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