All players are permitted to wear gloves, and goalkeepers usually wear specialist goalkeeping gloves. Prior to the 1970s gloves were rarely worn, but it is now extremely unusual to see a goalkeeper without gloves. In Portugal's match against England in the Euro 2004 tournament, Ricardo drew much comment for deciding to remove his gloves during the penalty shoot-out. Since the 1980s significant advancements have been made in the design of gloves, which now feature protectors to prevent the fingers bending backwards, segmentation to allow greater flexibility, and palms made of materials designed to protect the hand and to enhance a player's grip. Gloves are available in a variety of different cuts, including "flat palm", "roll finger" and "negative", with variations in the stitching and fit. Goalkeepers sometimes also wear caps to prevent glare from the sun or floodlights affecting their performance. Players with sight problems may wear glasses as long as there is no risk of them falling off or breaking and thereby becoming dangerous. Most players affected choose to wear contact lenses, although Dutch player Edgar Davids, unable to wear contact lenses due to glaucoma, was known for his distinctive wraparound goggles. Other items that may be dangerous to other players, such as jewellery, however, are not allowed. Players may also choose to wear headgear to protect themselves from head injury, or to prevent further such injuries, such as Petr Čech and Cristian Chivu's use of rugby helmets, as long as it presents no risk to the safety of the wearer or any other player. Match officials' kit Referees, assistant referees and fourth officials wear kits of a similar style to that worn by players; until the 1950s it was more common for a referee to wear a blazer than a jersey. Although not specified in the rules, it is considered a principle of football that officials wear shirts of a different colour to those worn by the two teams and their goalkeepers. Black is the traditional colour worn by officials, and "the man in black" is widely used as an informal term for a referee, although increasingly other colours are being used in the modern era to minimise colour clashes. The 1994 World Cup was the first in which FIFA dispensed with black kits for officials. Referees also sometimes have sponsors' logos on their shirts, although these are normally confined to the sleeves. History Victorian era The first