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Importance: Primary open-angle glaucoma presents with increased prevalence and a higher degree of clinical severity in populations of African ancestry compared with European or Asian ancestry. Despite this, individuals of African ancestry remain understudied in genomic research for blinding disorders., Objectives: To perform a genome-wide association study (GWAS) of African ancestry populations and evaluate potential mechanisms of pathogenesis for loci associated with primary open-angle glaucoma., Design, Settings, and Participants: A 2-stage GWAS with a discovery data set of 2320 individuals with primary open-angle glaucoma and 2121 control individuals without primary open-angle glaucoma. The validation stage included an additional 6937 affected individuals and 14 917 unaffected individuals using multicenter clinic- and population-based participant recruitment approaches. Study participants were recruited from Ghana, Nigeria, South Africa, the United States, Tanzania, Britain, Cameroon, Saudi Arabia, Brazil, the Democratic Republic of the Congo, Morocco, Peru, and Mali from 2003 to 2018. Individuals with primary open-angle glaucoma had open iridocorneal angles and displayed glaucomatous optic neuropathy with visual field defects. Elevated intraocular pressure was not included in the case definition. Control individuals had no elevated intraocular pressure and no signs of glaucoma., Exposures: Genetic variants associated with primary open-angle glaucoma., Main Outcomes and Measures: Presence of primary open-angle glaucoma. Genome-wide significance was defined as P < 5 × 10-8 in the discovery stage and in the meta-analysis of combined discovery and validation data., Results: A total of 2320 individuals with primary open-angle glaucoma (mean [interquartile range] age, 64.6 [56-74] years; 1055 [45.5%] women) and 2121 individuals without primary open-angle glaucoma (mean [interquartile range] age, 63.4 [55-71] years; 1025 [48.3%] women) were included in the discovery GWAS. The GWAS discovery meta-analysis demonstrated association of variants at amyloid-β A4 precursor protein-binding family B member 2 (APBB2; chromosome 4, rs59892895T>C) with primary open-angle glaucoma (odds ratio [OR], 1.32 [95% CI, 1.20-1.46]; P = 2 × 10-8). The association was validated in an analysis of an additional 6937 affected individuals and 14 917 unaffected individuals (OR, 1.15 [95% CI, 1.09-1.21]; P < .001). Each copy of the rs59892895*C risk allele was associated with increased risk of primary open-angle glaucoma when all data were included in a meta-analysis (OR, 1.19 [95% CI, 1.14-1.25]; P = 4 × 10-13). The rs59892895*C risk allele was present at appreciable frequency only in African ancestry populations. In contrast, the rs59892895*C risk allele had a frequency of less than 0.1% in individuals of European or Asian ancestry., Conclusions and Relevance: In this genome-wide association study, variants at the APBB2 locus demonstrated differential association with primary open-angle glaucoma by ancestry. If validated in additional populations this finding may have implications for risk assessment and therapeutic strategies.

Importance: Off-label antipsychotic prescribing in nursing homes (NHs) is common and is associated with increased risk of mortality in older adults. Prior large-scale, controlled trials in the NH setting failed to show meaningful reductions in antipsychotic use., Objective: To quantify the influence of a large-scale communication training program on NH antipsychotic use called OASIS., Design, Setting, and Participants: This investigation was a quasi-experimental longitudinal study of NHs in Massachusetts enrolled in the OASIS intervention. Participants were residents living in NHs between March 1, 2011, and August 31, 2013. The data were analyzed from December 2015, to March 2016, and from November through December 2016., Exposures: The OASIS educational program targets all NH staff (direct care and nondirect care) using a train-the-trainer model. The program goals were to reframe challenging behaviors of residents with cognitive impairment as the communication of unmet needs, to train staff to anticipate resident needs, and to integrate resident strengths into daily care plans., Main Outcomes and Measures: This study used an interrupted time series model of facility-level prevalence of antipsychotic medication use, other psychotropic medication use (antidepressants, anxiolytics, and hypnotics), and behavioral disturbances to evaluate the intervention's effectiveness in participating facilities compared with control NHs in Massachusetts and New York. The 18-month preintervention (baseline) period was compared with a 3-month training period, a 6-month implementation period, and a 3-month maintenance period., Results: This study included 93 NHs enrolled in the OASIS intervention (27 of which had a high prevalence of antipsychotic use) compared with 831 nonintervention NHs. Among OASIS facilities, prevalences of atypical antipsychotic prescribing were 34.1% at baseline and 26.5% at the study end (absolute reduction of 7.6% and relative reduction of 22.3%) compared with a drop of 22.7% to 18.8% in the comparison facilities (absolute reduction of 3.9% and relative reduction of 17.2%). In the OASIS implementation phase, NHs experienced a reduction in antipsychotic use prevalence among OASIS facilities (-1.20%; 95% CI, -1.85% to -0.09% per quarter) greater than that among non-OASIS facilities (-0.23%; 95% CI, -0.47% to 0.01% per quarter), resulting in a net OASIS influence of -0.97% (95% CI, -1.85% to -0.09%; P = .03). A difference in trend was not sustained in the maintenance phase (difference of 0.93%; 95% CI, -0.66% to 2.54%; P = .48). No increases in other psychotropic medication use or behavioral disturbances were observed., Conclusions and Relevance: Antipsychotic use prevalence declined during OASIS implementation of the intervention, but the decreases did not continue in the maintenance phase. Other psychotropic medication use and behavioral disturbances did not increase. This study adds evidence for nonpharmacological programs to treat behavioral and psychological symptoms of dementia.

Importance: Multiple studies have found an increased prevalence, younger age at onset, and more severe course of glaucoma in people of African descent, but these findings are based on studies conducted outside Africa., Objective: To determine the prevalence of glaucoma in an urban West African population of adults., Design and Setting: A population-based, cross-sectional study of adults 40 years and older conducted from September 1, 2006, through December 31, 2008, from 5 communities in Tema, Ghana., Participants: Participants from randomly selected clusters underwent a screening examination that consisted of visual acuity, frequency doubling perimetry, applanation tonometry, and optic disc photography. Participants who failed any of these tests were referred for complete examination, including gonioscopy, standard automated perimetry, and stereoscopic optic disc photography., Results: A total of 6806 eligible participants were identified, and 5603 (82.3%) were enrolled in the study. The field examination referred 1869 participants (33.3%) to the clinic examination, and 1538 (82.2%) came for complete examination. A total of 362 participants were identified as having glaucoma of any type and category. Primary open-angle glaucoma was the underlying diagnosis in 342 participants (94.5%). The prevalence of primary open-angle glaucoma was 6.8% overall, increasing from 3.7% among those 40 to 49 years old to 14.6% among those 80 years and older, and was higher in men than in women in all age groups, with an overall male-female prevalence ratio of 1.5. Of the participants with glaucoma, 9 (2.5%) were blind using World Health Organization criteria, and only 12 (3.3%) were aware that they had glaucoma., Conclusions and Relevance: The prevalence of glaucoma is higher in this urban West African population than in previous studies of people of East or South African and of non-African descent. Strategies to identify affected persons and effectively manage the burden of glaucoma are needed in West Africa.

Objective: To examine if racial differences exist in longitudinal care patterns for Medicare beneficiaries with glaucoma., Methods: We analyzed national longitudinal Medicare claims data from January 1, 1991, through December 31, 1999 in 21 644 Medicare beneficiaries linked to the National Long-Term Care Survey. Logistic regression was used to predict whether a person underwent an eye examination or eye surgery during the year, and negative binomial regression was used to predict the number of eye examinations and surgical procedures for glaucoma per year. Annual use of eye examinations was nearly identical for black persons (1.85 per year) and white persons (1.89 per year), whereas surgery rates were higher among blacks (0.15) than whites (0.08, P<.001)., Results: Blacks were more likely than whites to have glaucoma diagnosed, but rates among whites were higher than in prior population-based studies. When we controlled for other factors, blacks were not significantly less likely to undergo eye examination during the year; however, blacks were 78% more likely to undergo surgery (P < .001) and had 76% higher rates of surgical procedures (P < .001)., Conclusions: No systematic pattern was found of underuse among blacks relative to whites after glaucoma diagnosis. Higher rates of surgery among blacks may indicate delayed onset of care and/or greater disease severity.

Long silicone glaucoma tubes within the anterior chamber are frequently detrimental to the corneal endothelium and other anterior chamber structures. Tube shortening often involves extensive and potentially complicated surgery that requires tube removal and reinsertion. A new technique is described for trimming the silicone tube in situ. Besides permitting tube length modification within the anterior chamber, it also decreases operative time substantially. A representative case is described.

Objective: To measure scattered laser energy reaching the posterior pole during transscleral cyclophotocoagulation., Methods: Transscleral cyclophotocoagulation was performed on 4 cadaver eyes with Nd:YAG noncontact, Nd:YAG contact, and diode contact lasers. Energy was measured with a photodiode through a 7-mm trephined hole in the posterior pole. Average percentage power, average power, and average energy transmission were calculated. American Conference of Governmental Industrial Hygienists (ACGIH) guidelines were used to calculate allowable energy exposures for each laser., Results: All 3 lasers transmitted 3% to 5% of the power to the posterior pole. The average energy transmission was 240 to 260 mJ for all lasers. The contact lasers had an average power transmission of 120 mW. The noncontact Nd:YAG laser, with shorter pulse duration, had an average power transmission of 13,000 mW, significantly greater than that of the other lasers. The ACGIH guidelines for allowable energy exposures were 93 mJ for the noncontact Nd:YAG laser, 1300 mJ for the contact Nd:YAG laser, and 440 mJ for the contact diode laser., Conclusions: Three percent to 5% of laser power delivered during cyclophotocoagulation reaches the posterior pole. Exposure energies may approach or exceed ACGIH guidelines. The clinical significance of these findings remains to be shown.

Objective: To determine the relationship between central corneal thickness (CCT) and applanation intraocular pressure (IOP) in normal, glaucomatous, and ocular hypertensive eyes., Methods: One hundred nine subjects (184 eyes) were studied. Forty-eight patients (74 eyes) had glaucoma, 28 patients (51 eyes) had ocular hypertension, and 33 patients (59 eyes) were normal. Intraocular pressure as measured by applanation tonometry, refractive status, CCT, and axial length were measured for all subjects., Results: The CCT (mean +/- SD) of eyes with ocular hypertension was significantly greater (0.606 +/- 0.041 mm) than that of glaucomatous eyes (0.554 +/- 0.022 mm) (P < .001) or of normal controls (0.561 +/- 0.026 mm) (P < .001). There was no significant difference in CCT between normal and glaucomatous eyes (P = .40). The axial length (mean +/- SD) of eyes with ocular hypertension (23.54 +/- 1.34 mm) was not different compared with glaucomatous eyes (23.93 +/- 0.96 mm) (P = .13) or normal eyes (23.62 +/- 1.21 mm) (P = .83). There was no significant difference between the axial length for glaucomatous eyes compared with normal eyes (P = .18). Those eyes with glaucoma being treated with topical dorzolamide hydrochloride had a significantly increased CCT (0.560 +/- 0.025 mm) compared with those eyes with glaucoma not being treated with dorzolamide (0.551 +/- 0.20 mm) (P = .02)., Conclusions: The mean CCT is increased in eyes with ocular hypertension when compared with normal or glaucomatous eyes, which confirms the findings of other investigators. Increased CCT may give an artificially high IOP measurement by applanation tonometry. The CCT must be considered when developing a treatment approach for patients with ocular hypertension.