When you buy glasses, you have the option of choosing conventional (1.50 refractive index) or high index (1.60+) lenses. For our purposes, these numbers mostly affect the thickness of the lens relative to its power, with higher index lenses being thinner. Your prescription (sum of sphere + cylinder) will usually determine the type of lens you require, as follows:.

Data on the use of conspicuity aids, crash circumstances, participant demographics, cycling experience, safety equipment use and journey characteristics including an estimate of the bicycle crash risk for each chosen route (the number of previous crashes per 100 million kilometres travelled by bicycle calculated for each participant route) were collected using self completed questionnaires and maps. Conditional logistic regression was used to calculate crude and adjusted odds ratios and 95% confidence intervals of the risk of a crash involving a collision or evasion of a collision with another road user when cyclists reported they were using any item of fluorescent or retro reflective clothing or equipment vs. None.

President Joe Biden and his Chinese counterpart Xi Jinping held their first phone call as leaders and appeared at odds on most issues, even as Xi warned that confrontation would be a “disaster” for both nations. While Xi has called for “win win” cooperation, Biden has called China America “most serious competitor” and vowed to “out compete” Beijing. Infrastructure the United States must raise its game in the face of the Chinese challenge..

Counterfeiters threaten the aspirational qualities that allow luxury brands to justify their premium prices. But while fake fashion items continue to be the biggest business for counterfeiters, they are increasingly ripping off beauty products, medicines, electrical goods and toys with imitations that can cause serious harm. “There’s being blind drunk and being blinded if you were to drink one of these,” says Phil Lewis, director general of the Anti Counterfeiting Group (ACG).

“Whatever precise shape and form Brexit takes, if you’re France or Germany you have an incentive to see pan European businesses form,” says Skarbek. “We may see more European deals particularly between France and Germany which have historically been hard. We may see a rush.” Although the US and Asia are set to remain the most active regions for M activity, data from Dealogic shows that the value of deals between European countries last year rose 128pc to its highest level since 2014, with European firms involved in some of the world’s biggest deals..