Basic testing for scotopic sensitivity was tried by optometrists, opticians and orthoptists in UK hospitals, and by optometrists and opticians in private practice employing a technique that used the Intuitive Colorimeter, developed under Medical Research Council licence. An alternative approach to correct Irlen syndrome was tried by Orthoscopics franchise in the UK, with wide colour coverage and tints manufactured by Hoyato match. Other commercial organisations have produced sets of therapeutic tints, although most have not received scientific evaluation.Studies investigating Irlens syndrome as a treatable condition have been criticised for having a biased and subjective approach to their research.Treatments offered by Irlens practitioners have not been found to be effective in improving reading ability. Classifications
Irlen divides Irlen syndromes into six types: photophobia, distortion of the fundus, graphical distortions during reading, decreased visual field, difficulty in ocular fixation during reading and change in depth perception. Research
The disorders have been studied in several institutions, including the Psychology Department at Essex University, the former Applied Psychology Unit, Cambridge University in England, and in the case of Meares-Irlen syndrome, Visual Unit at Glasgow Caledonian University in Scotland. As of 2012 the Visual Stress Unit offered non-commercial diagnostic and therapeutic services to individuals, and provided advice to the Scottish National Health Service. In Australia, Irlen syndrome was researched by Paul Whiting at the University of Sydney. Whiting set up the first Irlen Dyslexia Centre in Australia, which operated in the Childrens Centre at Sydney University for more than 15 years.
In Rome today, there are four archpriests, one for each of the four papal major basilicas; all of them are presently bishops :

Archbasilica of Saint John Lateran
Basilica of Saint Peter
Basilica of Saint Mary Major
Basilica of Saint Paul outside the WallsThe use of "archpriest" in the Latin Catholic Church  should not be confused with "protopriest", the senior Cardinal-Priest in the College of Cardinals. According to the specific historical tradition, many churches throughout the world, other than basilicas, are under the authority of a priest who bears the title of archpriest. However, the title is mostly honorary and today, such an archpriest has no control over subordinate clergy other than that of a parish priest over junior clergy assigned to assist him in meeting pastoral needs. In the  Latin Catholic Church, it was traditional in some localities for a priest to be assisted at his First Mass by another priest termed for the occasion the archpriest, who  functioned as the deacon otherwise does. This was not a permanent title but referred only to the particular occasion. Church of England
In the Church of England there is at least one archpriest, the Archpriest of Haccombe. The title is a survival of local  practice of Latin Catholic Church prior to the Reformation. It was first employed in AD 1315 and has been held ever since.