background: photorefractive keratectomy is a popular mean to correct refractive errors of the eye and haze formation is one of the most important complications of the surgery. although standard dose of intraoperative mitomycin c has shown to be effective in reduction of this complication, potential side effects of mitomycin c promote us to show if the lower concentration of mitomycin c has t he...

Haze is a major environmental concern in many cities because it adversely affects people’s physiological and psychological well-being. This paper examines the extent of haze in Macao during the period 1986–2016. It identifies the relationships between haze, energy use, and meteorological conditions directly. The haze in Macao changed over the period 1986–2016 with air pollution getting worse an...

It is suggested that the incorporation of HCN in Titan’s atmospheric haze may be an important process affecting the HCN profile and the C/N ratio in Titan’s haze. By introducing a loss to the haze term for HCN (i.e. a production term of “poly-HCN”) in the photochemical model of Lara et al. (1996), we have improved the model’s ability to simultaneously reproduce the observed HCN and C2 hydrocarb...

[1] Previous laboratory studies of haze aerosols analogous to those in Titan’s atmosphere have shown evidence of the formation of polycyclic aromatic hydrocarbons (PAHs). If present, PAHs may provide a mechanism for both particle formation and nitrogen incorporation. We have conducted new experiments simulating Titan haze production using an Aerosol Mass Spectrometer (AMS). The AMS allows us to...

PURPOSE An increase in corneal temperature has been implicated in subepithelial haze after surface photorefractive keratectomy. We aimed to determine if cooling the cornea by means of hydration between ablations and immediately after final surface ablation in PRK reduces haze. METHODS One hundred five eyes of 61 patients with myopia ranging from -6.00 to -9.75 D were included. One of the surg...

This paper presents a review on the different haze removal techniques. Haze brings trouble to many computer vision/graphics applications as it diminishes the visibility of the scene. Haze is formed due to the two fundamental phenomena that are attenuation and the air light. Attenuation reduces the contrast and air light increases the whiteness in the scene. Haze removal techniques recover the c...

Burning agricultural straw before and/or after harvest is a common farming practice. Regional and extensive agricultural open field straw burning can cause serious air pollution events. This paper looks at the effects of biomass burning emission on regional haze that should be considered in the forecasting of regional haze. It describes the current state of crop residue burning in China, and an...

The East China Plains (ECP) region experienced the worst haze pollution on record for January in 2013. We show that the unprecedented haze event is due to the extremely poor ventilation conditions, which had not been seen in the preceding three decades. Statistical analysis suggests that the extremely poor ventilation conditions are linked to Arctic sea ice loss in the preceding autumn and exte...

determinants of early onset haze were retrospectively explored in patients who had been undergone laser-assisted sub-epithelial keratectomy (lasek) in a private eye clinic. the technique included creating an epithelial flap following 20 seconds exposure to 20% alcohol. ‘optimized’ ablation profile was used by allegretto laser (wavelight technologie). following repositioning of the flap, a singl...

The Archean Earth (3.8 to 2.5 billion years ago) was probably enshrouded by a photochemical haze composed of fractal aggregate hydrocarbon aerosols. The fractal structure of the aerosols would have had a strong effect on the radiative properties of the haze. In this study, a fractal aggregate haze was found to be optically thick in the ultraviolet wavelengths while remaining relatively transpar...