Hydrogeochemical mineral exploration in deeply weathered terrains: An example from Mumbwa, Zambia.

Locating mineral deposits in areas of thick or transported overburden is notoriously difficult. Post-mineral cover is prevalent in many parts of the globe and has led to prospective geological sequences being missed by traditional methods of exploration. Hydrogeochemistry is particularly applicable for the exploration of Iron Oxide Copper Gold (IOCG) deposits because, when compared to larger porphyry or sediment-hosted systems, IOCG deposits tend to be smaller and high-grade with a limited lateral footprint to intersect with grid-drilling; groundwater interactions and ion dispersion tend to produce a much larger anomaly target than regolith geochemistry alone and require fewer samples.

Ocular findings in glutaric aciduria type 1.

Purpose: To determine the nature and course of ocular abnormalities in glutaric aciduria (acidemia) type 1 (GA1).

Methods: Fifteen children with GA1 have been studied in the Republic of Ireland. A retrospective review of the records of the 6 children who died during their illness and prospective clinical examination of 9 survivors were performed.

Intraocular lenses in children: changes in axial length, corneal curvature, and refraction.

Aim: To assess changes in axial length, corneal curvature, and refraction in paediatric pseudophakia.

Methods: 35 eyes of 24 patients with congenital or developmental lens opacities underwent extracapsular cataract extraction and posterior chamber intraocular lens implantation. Serial measurements were made of axial length, corneal curvature, objective refraction, and visual acuity.

Congenital ptosis: longterm results using stored fascia lata.

Purpose: Frontalis brow suspension, using stored donor fascia lata, allows early correction of severe congenital ptosis. We report longterm results of 18 patients, (29 ptotic eyelids).

Methods: Patient records were retrospectively reviewed.

Uniocular childhood blindness: a prospective study.

Purpose: This prospective study examines uniocular blindness among children younger than 16 attending a large pediatric ophthalmology department. The aim was to identify the causes of uniocular blindness and determine how much is preventable. We defined blindness according to the World Health Organization definition of vision worse than or equal to 3/60.