The urbanized region ofJing(Beijing)Jin(Tianjin)-Ji (alias of Hebei province) and its nearby surrounding region (3JNS) is becoming China’s most polluted area by haze, exceeding even the Yangtze and Pearl river deltas. Aside from pollutant emission, the meteorology of the planetary boundary layer (PBL) is the most important factor affecting haze pollution. Focusing on July 2008, the aerosol opti...

PURPOSE To determine the natural history of collagen crosslinking (CXL)-associated corneal haze measured by Scheimpflug imagery and slitlamp biomicroscopy in patients with keratoconus or ectasia after laser in situ keratomileusis. SETTING Cornea and refractive surgery subpecialty practice, United States. DESIGN Prospective randomized controlled clinical trial. METHODS The treatment group ...

In this paper, we introduce a simple but effective method in order to remove haze in foggy images. We name it as dark pixel detection. Dark pixel is the pixel in haze-free images with values in all of the RGB colour channels close to zero. With this method, we can effectively estimate the thickness of the haze and recover a vivid haze-free scene even when the scene object is inherently similar ...

AIM To evaluate the in vivo confocal microscopic corneal features seen in patients who underwent Descemet's stripping with endothelial keratoplasty (DSEK) and to correlate these findings with the postoperative best spectacle-corrected visual acuity (BSCVA) obtained at the time of confocal microscopy. METHODS Observational case series. A review of charts and confocal microscopy images and vide...

BACKGROUND To evaluate the in vivo corneal changes using in vivo confocal microscopy (IVCM) and anterior segment optical coherence tomography (AS-OCT) in patients with Fuchs' dystrophy who underwent Descemet stripping automated endothelial keratoplasty (DSAEK) and the relationship between these changes and the postoperative visual recovery up to 1-year follow-up. METHODS Before DSAEK and 1 da...

Experimental studies were performed to simulate the action of long wavelength solar UV light on Titan s atmosphere. The experiments were carried out in a photochemical flow reactor using a mixture of gases representative of Titan s atmosphere at 70 north latitude (Titan s north pole) in the winter. The solid analog of Titan s haze formed has optical properties comparable to that determined for ...

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...