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:

Macular nerve fibre and ganglion cell layer changes in acute Leber's hereditary optic neuropathy
Aims

To evaluate longitudinal retinal ganglion cell inner plexiform layer (GC-IPL) and macular retinal nerve fibre layer (mRNFL) thickness changes in acute Leber's hereditary optic neuropathy (LHON).

Methods

Six eyes of four patients with LHON underwent SD-OCT (optical coherence tomography) at month 1, 3, 6 and 12 after visual loss. In two eyes, the examination was carried out in the presymptomatic stage. The relationship and curves for area under the receiver operator characteristic (AUROC) were generated to assess the ability of each parameter to detect ganglion cell loss.

Results

Significant longitudinal thinning of GC-IPL and mRNFL was detected in LHON. GC-IPL thinning was detectable in the deviation map during the presymptomatic stage in the inner ring of the nasal sector and then it progressively extended following a centrifugal and spiral pattern. Similarly, mRNFL thinning began in the inferonasal sector and it progressively extended. No further statistically significant changes were detected after month 3. The highest level of AUROC values at 1 month were detected in the nasal sectors and inferonasal mRNFL thickness reached AUROC value=1. All the parameters were equally able to detect ganglion cell loss from month 2 to 12.

Conclusions

The natural history of GC-IPL thinning follows a specific pattern of reduction, reflecting the anatomical course of papillomacular fibres. Month 6 represents the end of GC-IPL loss. GC-IPL and mRNFL thinning is detectable before onset of visual loss. These observations can help future therapeutic approaches for both LHON carriers at high risk of conversion and patients with acute early LHON.

Author: Balducci, N., Savini, G., Cascavilla, M. L., La Morgia, C., Triolo, G., Giglio, R., Carbonelli, M., Parisi, V., Sadun, A. A., Bandello, F., Carelli, V., Barboni, P.
Posted: August 18, 2016, 6:13 am
Blindness, cataract surgery and mortality in Ethiopia
Purpose

To examine the relationships between blindness, the intervention of cataract surgery and all-cause mortality in a rural Ethiopian population.

Design

Population-based, interventional prospective study.

Methods

Community-based detection methods identified blind Ethiopian persons from two selected kebeles in Amhara region, Ethiopia. Data from 1201 blind patients were collected—628 cataract-blind and 573 blind from other conditions. Free cataract surgery was provided for consenting, cataract-blind patients. Follow-up surveys were conducted after 12 months (±1 month)—the main outcome measure for this report is all-cause mortality at 1 year.

Results

During the follow-up period, 110 persons died from the selected population (mortality 9.2%), which consisted of those cataract-blind patients who received cataract surgery (N=461), cataract-blind patients who did not receive surgery (N=167) and all non-cataract-blind patients (N=573). Of the 461 patients who received cataract surgery, 44 patients died (9.5%). Of the 740 patients who did not receive surgery, 66 died (8.9%)—28 patients from the cohort of cataract-blind patients who did not receive surgery (16.8%) and 38 patients from the cohort of non-cataract blind (6.6%). Subgroup analysis revealed significantly increased odds of mortality for cataract-blind patients over 75 years of age who did not receive surgery and for unmarried patients of all age groups.

Conclusions

In this population, mortality risk was significantly elevated for older cataract-blind patients when compared with non-cataract-blind patients—an elevation of risk that was not noted in an age-matched cohort of cataract-blind patients who underwent cataract surgery as early as 1-year follow-up.

Author: Thomas, B. J., Sanders, D. S., Oliva, M. S., Orrs, M. S., Glick, P., Ruit, S., Chen, W., Luoto, J., Tasfaw, A. K., Tabin, G. C.
Posted: August 18, 2016, 6:13 am
Enlargement of the superior rectus and superior oblique muscles causes intorsion in Graves eye disease
Purpose

To review the prevalence of preoperative and postoperative intorsion in patients with strabismus and Graves’ eye disease (GED), and to correlate the intorsion with coexisting superior rectus (SR) and superior oblique (SO) muscle enlargement as a possible mechanism causing intorsion in these patients.

Methods

Charts of consecutive patients with GED who underwent strabismus surgery between 1 January 2010 and 1 April 2013 were retrospectively reviewed. Of these, patients with orbital CT or MRI scan were identified for further analysis. Clinical characteristics documented included age, gender, horizontal and vertical deviation, subjective torsional deviation, specific extraocular muscles (EOMs) operated upon, EOM enlargement on CT/MRI scans and width and thickness of SO, SR group and inferior rectus (IR).

Results

Charts of 45 patients (14 males and 31 females) were reviewed. Mean age was 56.8±12.5 years. Of these, seven (15.6%) patients demonstrated intorsion, and 38 (84.4%) patients demonstrated extorsion preoperatively. But after strabismus surgery, 15 (39.5%) of the 38 patients with preoperative extorsion demonstrated postoperative intorsion and 23 (60.5%) patients continued to show postoperative extorsion. On analysis of CT/MRI scans in these patients, only an increase in the thickness of SR group and the thickness/width of SO muscle were significantly associated with preoperative and postoperative intorsion; while age, gender, preoperative horizontal or vertical deviation and IR recession were unrelated to preoperative or postoperative intorsion. Postoperative intorsion was also associated with smaller degrees of preoperative extorsion (<3.5°).

Conclusions

Preoperative SR and/or SO muscle enlargement appear to be a primary contributing factor relating to preoperative and postoperative intorsion in patients with GED-associated strabismus. Patients with only small amounts of preoperative extorsion (<3.5°) in the presence of tight IRs should be carefully evaluated for possible SR and/or SO involvement by CT or MRI scan to predict those at risk for and plan for prevention/treatment of postoperative intorsion.

Author: Wei, Y., Kang, X. l., Del Monte, M. A.
Posted: August 18, 2016, 6:13 am
Established and emerging ancillary techniques in management of microbial keratitis: a review

Microbial keratitis is a sight-threatening condition and an ocular emergency, because of the potential for rapid progression. Intensive topical antimicrobials are the mainstay and the gold standard of treatment for microbial keratitis. However, despite appropriate diagnosis and therapy, treatment failure is still common, and can result in significant morbidity due to corneal perforation and/or scarring. For this reason, clinicians continue to seek novel treatment techniques in order to expand the armamentarium of tools available to manage microbial keratitis, and in doing so improve clinical outcomes. In this review, we examine the evidence for some established, as well as a few emerging ancillary techniques used to manage microbial keratitis. These include topical corticosteroids, corneal collagen cross-linking, intrastromal antimicrobials, amniotic membrane transplantation and miscellaneous other techniques. Of these, collagen cross-linking shows some promise for selected cases of infectious keratitis, although more research in the area is required before it is accepted as mainstream treatment for this potentially blinding condition.

Author: Robaei, D., Carnt, N., Watson, S.
Posted: August 18, 2016, 6:13 am
Microcatheter-assisted trabeculotomy versus rigid probe trabeculotomy in childhood glaucoma
Purpose

To compare microcatheter-assisted trabeculotomy with standard rigid probe trabeculotomy for the treatment of childhood glaucoma.

Methods

The early postoperative (12 months) results of microcatheter-assisted trabeculotomy (group 1) performed by single surgeon were retrospectively compared with those of rigid probe trabeculotomy (group 2) performed by the same surgeon in patients treated for childhood glaucoma. Success was defined as an intraocular pressure (IOP) <21 mm Hg with at least a 30% reduction from preoperative IOP with (qualified success) or without (complete success) the use of anti-glaucoma medication.

Results

A total of 43 eyes of 36 patients were included. Mean IOP in group 1 was significantly lower than that in group 2 at 6 months (17.0±5.1 vs 22.5±9.8; p=0.042), 9 months (16.3±5.0 vs 21.6±9.6; p=0.009) and 12 months (14.8±2.5 vs 19.0±7.1; p=0.049) postoperatively. The mean percentage reduction in IOP from preoperative to the last postoperative follow-up was greater in group 1 (47.3±17.7%) than in group 2 (34.2±21.9%) (p=0.036). group 1 demonstrated an 81.0% complete and 86.4% qualified success rate, exceeding the 51.6% complete (p=0.060) and 61.9% qualified (p=0.037) success rate of group 2. There were no long-term complications in either group, but choroidal detachment occurred in one eye in group 2.

Conclusion

Microcatheter-assisted circumferential trabeculotomy is a more effective treatment and is as safe as traditional trabeculotomy with a rigid probe for primary congenital glaucoma in the early postoperative course.

Trial registration number

ChiCTR-OCC-15005789, Results.

Author: Shi, Y., Wang, H., Yin, J., Li, M., Zhang, X., Xin, C., Chen, X., Wang, N.
Posted: August 18, 2016, 6:13 am
Prosthetic replacement of the ocular surface ecosystem: impact at 5 years
Background/aims

To determine the impact of prosthetic replacement of the ocular surface ecosystem (PROSE) treatment at 5 years.

Methods

Retrospective review of clinical, manufacturing and quality databases at the Boston Foundation for Sight.

Results

121 patients who completed treatment and had 5-year follow-up data were identified from a cohort of patients (n=199) seen in consultation for PROSE treatment from January 2008 to June 2008. Mean age was 52 years, M:F=56:65. The primary indication for treatment was ocular surface disease (OSD) in 64 patients and distorted corneal surface in 57 patients. At 5 years, continued device wear was confirmed in 89/121 (73.6%) patients. Discontinuation of wear was confirmed in 32/121 (26.4%). There was an increased likelihood of continued device wear at 5 years in patients with distorted cornea (84%) compared with those with OSD (64%), (p=0.0121, 2). National Eye Institute Visual Function Questionnaire (NEI VFQ-25) composite score increased for patients wearing PROSE devices at 6 months (=+23 points, mean=82, p<0.001, two-tailed t test) with no significant decline among those still wearing a device at 5 years (=–4 points, mean=78, p=0.22, two-tailed t test). At 5 years, those wearing (mean=78) had a higher NEI VFQ-25 than those not wearing (mean=70, p=0.029, two-tailed t test).

Conclusions

PROSE treatment offers continued benefit, as defined by improved visual function and continued device wear at 5 years, in patients with complex corneal disease. Patients with distorted cornea have a higher rate of continued wear at 5 years than patients with OSD, although this is not true among all subgroups within OSD.

Author: Agranat, J. S., Kitos, N. R., Jacobs, D. S.
Posted: August 18, 2016, 6:13 am
Clinical manifestations and outcome of tuberculous sclerokeratitis
Aim

To study the clinical manifestations and outcome of patients with tuberculous sclerokeratitis treated with antituberculous therapy without concomitant use of systemic steroids.

Methods

We reviewed retrospectively the medical records of eight consecutive patients with tuberculous sclerokeratitis. Patients were treated unsuccessfully with topical and/or systemic steroids. They underwent complete ophthalmic examination, systemic evaluation, laboratory investigations and imaging. Tuberculin skin test was done with purified protein derivative (PPD) on all patients. The diagnosis of tuberculous sclerokeratitis was made based on clinical findings of scleritis with adjacent peripheral corneal stromal keratitis, positive PPD test of 15 mm of induration or more, response to antituberculous treatment (ATT) within 4 weeks and exclusion of other causes of sclerokeratitis. Antituberculous drugs were given for a minimum of 6 months without concomitant use of corticosteroids. The outcome measure was resolution of the ocular surface inflammation of the sclera and cornea.

Results

Eight consecutive patients with a diagnosis of tuberculous sclerokeratitis were included. There were one male and seven female patients. The mean age was 29 years with an age range of 7–43 years. The involvement of the sclera was nodular in six patients and diffuse in two. The involvement of the cornea consisted of peripheral corneal stromal inflammation adjacent to the area of scleritis. Patients responded to antituberculous medications with complete resolution of the sclerokeratitis without topical or systemic anti-inflammatory agents.

Conclusions

Antituberculous medications can lead to complete resolution of the sclerokeratitis without concomitant use of steroids, or other anti-inflammatory agents.

Author: Shoughy, S. S., Jaroudi, M. O., Tabbara, K. F.
Posted: August 18, 2016, 6:13 am
Aetiology-specific comparison of long-term outcome of deep anterior lamellar keratoplasty for corneal diseases
Aims

To evaluate the long-term outcome of deep anterior lamellar keratoplasty (DALK) for the treatment of herpetic keratitis, keratoconus, stromal scars and corneal dystrophies.

Methods

This retrospective consecutive case study includes 275 consecutive eyes of 254 patients who underwent DALK; 35 eyes with herpetic keratitis, 114 eyes with stromal scar, 93 eyes with keratoconus and 67 eyes with corneal dystrophy. Exclusion criteria included therapeutic DALK for the treatment of descemetocele or infectious keratitis, and eyes with limbal stem cell deficiency. Patients were examined at 1, 3 and 6 months, and 1, 3 and 5 years after DALK. Graft survival rate, best corrected visual acuity (BCVA), endothelial cell density (ECD) and postoperative complications were evaluated.

Results

The mean postoperative follow-up duration was 51±41 months. The graft survival rate of all subjects was 96.8% at 1 year, 89.9% at 3 years, 83.5% at 5 years and 74.1% at 10 years. At 6 months, BCVA significantly improved from 1.14±0.54 to 0.22±0.21 in the keratoconus group, from 1.13±0.60 to 0.44±0.54 in the herpes group, from 1.00±0.59 to 0.49±0.38 in the stromal scar group and from 1.04±0.52 to 0.32±0.29 in the corneal dystrophy group (all, p<0.0001). BCVA stabilised after 6 months thereafter up to 5 years. ECD decreased just after DALK and maintained >1000 cell/mm2 at 5 years in all groups.

Conclusions

DALK provides good visual acuity with slight ECD decrease over long term in all groups.

Author: Ogawa, A., Yamaguchi, T., Mitamura, H., Tomida, D., Shimazaki-Den, S., Murat, D., Satake, Y., Shimazaki, J.
Posted: August 18, 2016, 6:13 am
Perceptual visual dysfunction, physical impairment and quality of life in Bangladeshi children with cerebral palsy
Background

Cerebral palsy (CP) is the most common cause of motor disability in children and is often accompanied by sensory and/or cognitive impairment. The aim of this study was to characterise visual acuity impairment, perceptual visual dysfunction (PVD) and physical disability in a community-based sample of Bangladeshi children with CP and to assess the impact of these factors on the quality of life of the children.

Methods

A key informant study was used to recruit children with CP from Sirajganj district. Gross Motor Function Classification System (GMFCS) levels and visual impairment were assessed by a physiotherapist and an optometrist, respectively. Assessments of visual perception were performed and standardised questionnaires were administered to each child's main carer to elicit indicators of PVD and parent-reported health-related quality of life. A generalised linear regression analysis was conducted to assess the determinants of the quality of life scores.

Results

180 children were recruited. The median age was 8 years (IQR: 6–11 years); 112 (62%) were male; 57 (32%) had visual acuity impairment and 95 (53%) had some parent-reported PVD. In analyses adjusted for age, sex, GMFCS and acuity impairment, visual attention (p<0.001) and recognition/navigation (p<0.001) were associated with total health-related quality of life, and there were similar trends for total PVD score (p=0.006) and visual search (p=0.020).

Conclusions

PVD is an important contributor in reducing quality of life in children with CP, independent of motor disability and acuity impairment. Better characterisation of PVD is important to help design interventions for affected children, which may improve their quality of life.

Author: Mitry, D., Williams, C., Northstone, K., Akter, A., Jewel, J., Khan, N., Muhit, M., Gilbert, C. E., Bowman, R.
Posted: August 18, 2016, 6:13 am
Differential precision of corneal Pentacam HR measurements in early and advanced keratoconus
Background/aims

Serial Scheimpflug corneal tomography to monitor the progression of keratoconus has become standard practice in most countries where corneal cross-linking is available. The tomographic definitions of progression are, however, poorly defined. The aims of this study were: (a) to estimate the 95% limits of intraobserver and interobserver agreement of corneal shape parameters on Pentacam in patients with keratoconus and (b) to investigate whether these limits of agreement varied according to disease severity.

Methods

96 adult patients with keratoconus and no corneal scarring or history of previous surgery were recruited from a corneal clinic in a tertiary ophthalmology hospital. One eye of each subject was scanned twice by each of the two observers with the Pentacam HR. 95% limits of intraobserver and interobserver agreement for K1, K2, Kmax and corneal thickness at the thinnest corneal location (TCT) were calculated.

Results

Reproducibility of keratometry measures was better for early keratoconus than advanced keratoconus. In patients of Pentacam-derived Krumeich stage 1 or 2, the 95% limits of interobserver agreement for Kmax were from –0.90 to 1.01. In patients of Pentacam-derived Krumeich stage >2, the 95% limits of interobserver agreement for Kmax were from –3.71 to 3.86.

Conclusions

Keratometric measurements on Pentacam HR are less reproducible in advanced keratoconus than in early keratoconus. In patients of Pentacam-derived Krumeich stage 1 or 2, an increase in K1, K2 or Kmax of more than 1 dioptre is likely to represent the real change in the corneal shape.

Author: Flynn, T. H., Sharma, D. P., Bunce, C., Wilkins, M. R.
Posted: August 18, 2016, 6:13 am

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