ABSTRACT
An indoor car park was appropriately equipped in order to test the de-polluting efficiency of a TiO(2)-containing paint in an indoor polluted environment, under real scale configuration. Depollution tests were performed in an artificially closed area of the parking, which was polluted by a car exhaust during the testing period. The ceiling surface of the car park was covered with white acrylic TiO(2)-containing paint (PP), which was developed in the frame of the EU project 'PICADA' (Photocatalytic Innovative Coverings Application for Depollution Assessment). The closed area was fed with car exhaust gases. As soon as the system reached steady state, the UV lamps were turned on for 5h. The difference between the final and the initial steady state concentration indicates the removal of the pollutants due to both the photocatalytic paint and car emission reduction. Results showed a significant photocatalytic oxidation of NO(x) gases. The photocatalytic removal of NO and NO(2) was calculated to 19% and 20%, respectively, while the photocatalytic rate (microgm(-2)s(-1)) ranged between 0.05 and 0.13 for NO and between 0.09 and 0.16 for NO(2).
Subject(s)
Air Pollutants/chemistry , Air Pollutants/radiation effects , Nitrogen Oxides/chemistry , Nitrogen Oxides/radiation effects , Paint , Titanium/chemistry , Air Pollutants/analysis , Air Pollution, Indoor/prevention & control , Carbon Dioxide/analysis , Carbon Dioxide/chemistry , Carbon Dioxide/radiation effects , Carbon Monoxide/analysis , Carbon Monoxide/chemistry , Carbon Monoxide/radiation effects , Catalysis , Nitrogen Oxides/analysis , Photochemistry , Sulfur Dioxide/analysis , Sulfur Dioxide/chemistry , Sulfur Dioxide/radiation effects , Ultraviolet Rays , Vehicle Emissions/analysisABSTRACT
Pronounced visual loss can lead to nystagmus, provoking oscillopsia and distressing ocular sensations. The treatment of acquired nystagmus remains difficult and various therapeutic options are attempted with limited results. We report the case of a man with acquired nystagmus and excessive ocular discomfort, successfully treated with repeated retrobulbar injections with botulinum toxin.
Subject(s)
Blindness/complications , Botulinum Toxins, Type A/administration & dosage , Neuromuscular Agents/administration & dosage , Nystagmus, Pathologic/drug therapy , Nystagmus, Pathologic/etiology , Retinitis Pigmentosa/complications , Humans , Injections , Male , Middle Aged , Orbit , Retreatment , Treatment OutcomeABSTRACT
Antisuppressive occlusion is an intermittent occlusion prescribed in order to eliminate suppression. This way, the system of vergences is reactivated which results in a stabilisation of the position of the eyes and reduces asthenopic complaints. Miotics are used to treat a recent or intermittent convergent squint. Miotics can equally be used to remove positive glasses and to reduce a visible postoperative recurrence.
Subject(s)
Esotropia/therapy , Miotics/therapeutic use , Orthoptics/methods , Accommodation, Ocular , Child , Convergence, Ocular , Esotropia/drug therapy , Esotropia/physiopathology , Eyeglasses , HumansABSTRACT
Photoscreening is a photographic method to determine whether a child's eyes focus properly or not. This method can be used from the moment the child is able to fix, which is around six months. Photoscreening allows us to detect a hypoaccommodation and to determine the minimal optical correction to prescribe. It is used to evaluate the postoperative position of the eyes and shows the dominant eye. This eye should be occluded intermittently in order to prevent amblyopia and/or a relapse of the squint.
Subject(s)
Fixation, Ocular , Photography/methods , Strabismus/diagnosis , Accommodation, Ocular , Amblyopia/diagnosis , Amblyopia/physiopathology , Child , Child, Preschool , Convergence, Ocular , Humans , Strabismus/physiopathologyABSTRACT
The authors present a photographical method to screen infants on the presence of refractive errors and squint. The photoscreener indicates an absence of focusing in one or both eyes and/or a squint. This method can be used in mass-screening of siblings, the evaluation of glasses, the monitoring of the effects of occlusion and the postoperative follow-up of patients.
Subject(s)
Amblyopia/diagnosis , Strabismus/diagnosis , Child, Preschool , Fixation, Ocular , Humans , Infant , Mass Screening , Photography/methods , Refractive Errors/diagnosis , Refractive Errors/epidemiology , Refractive Errors/physiopathologyABSTRACT
The authors describe a new technique to deal with Duane's retraction syndrome. The vertical recti are rotated around their longitudinal axis with saving of the temporal ciliary arteries in order to prevent anterior segment ischemia. The results of 52 patients operated upon are discussed. The technique proved to be successful in the treatment of head posture, esotropia and limitation of abduction.
