Top focal degrees deviation

Description

Top focal degrees deviation The focal degrees of nominal top sunglasses 0.00 D, lens should oakley value the deviation or lenses made with rimmed assembly with discrepancies, are likely to produce top the deviation (namely the focal degrees with or positive or negative top focal degrees), if exceed a certain range, the wearer may feel inspect content deformation, serious oakley gascan can directly affect the wearer eyesight health. Corresponding to the GB10810.1 “eyeglass lenses part 1: ChanGuang and much focus lens” national standards table 1 demand, the ball lens cap focal degrees tolerance weight for + 0.12 D; Column oakley minute lens cap focal degrees for + 0.09 D tolerance weight. The prism degree Sunglasses, Δ 0.00 prism degree shall be with the prism degree if lens, it will produce inspect content move coke, if exceed the scope of standard allows, it could cause binocular visual content cannot, or produced another one sunglasses oakley balance, not exacerbate the wearer’s eye flesh and adjust the optic nerve disorder, serious still can cause nerve adjustment disorder or produce strabismus, etc. According to the demand, the GB10810.1 table 4 prism degree oakley ski goggles tolerance weight Δ for 0.25. Light transmission ratio (τ V) For light color sunglasses, its light transmission > 40%; than should To shading lens, the scope of their optical transmission ratio for 8% ~ 40%. Light transmission project is characterized than an important index of sunglasses function. China’s current oakley shoes standard according to this function will be divided into three categories: sunglasses shading mirror, light color sunglasses and special purpose sunglasses, European and international standard will it into 5 kinds. Category is different, the purposes are completely different. Sunglasses If use light color sunglasses for the wearer with oakley straight jacket shade, unable to obtain the good will shading effects, such as long time in sunshine strong outdoor activities, the wearer can still more intense stimulation by feel tired. Light color sunglasses generally up adornment effect, or used oakley sunglasses uk in sunshine is not strong indoor, etc. Conversely, indoors or doesn’t need to keep out of intense sunshine place wearing sunshade lens, will be generated by the pupil excessive amplification unwell, easy fatigue, etc. The mirror in the shade, transmission smaller product doesn’t suit cyclist or drivers wearing, because cyclists or drivers travel faster than pedestrian fast, transmission ratio is too low will Oakley Water Goggles sale affect their response capacity.