Experimental approaches in sensory substitution are beginning to provide access to arbitrary live views from a camera. Modified visual output that includes large print and/or clear simple graphics can be of benefit to users with some residual vision. Other aids and techniques
Blind people may use talking equipment such as thermometers, watches, clocks, scales, calculators, and compasses. They may also enlarge or mark dials on devices such as ovens and thermostats to make them usable. Other techniques used by blind people to assist them in daily activities include:

Adaptations of coins and banknotes so that the value can be determined by touch. For example:
In some currencies, such as the euro, the pound sterling and the Indian rupee, the size of a note increases with its value. On US coins, pennies and dimes, and nickels and quarters are similar in size. The larger denominations (dimes and quarters) have ridges along the sides (historically used to prevent the "shaving" of precious metals from the coins), which can now be used for identification. Some currencies banknotes have a tactile feature to indicate denomination. For example, the Canadian currency tactile feature is a system of raised dots in one corner, based on braille cells but not standard braille. It is also possible to fold notes in different ways to assist recognition.
Diagnosis
LGL syndrome is diagnosed in a person who has experienced episodes of abnormal heart racing (arrhythmias) who has a PR interval less than or equal to 0.12 second (120 ms) with normal QRS complex configuration and duration on their resting ECG. A short PR interval found incidentally on an ECG without episodes of tachycardia is simply a benign ECG variant.LGL can be distinguished from WPW syndrome because the delta waves seen in WPW syndrome are not seen in LGL syndrome. The QRS complex will also be narrow in LGL syndrome, as opposed to WPW, because ventricular conduction is via the His-Purkinje system. Lown–Ganong–Levine syndrome is a clinical diagnosis that came about before the advent of electrophysiology studies. It is important to be aware that not all WPW ECGs have a delta wave; the absence of a delta wave does not conclusively rule out WPW. Prognosis
Individuals with LGL syndrome do not carry an increased risk of sudden death. The only morbidity associated with the syndrome is the occurrence of paroxysmal episodes of tachycardia which may be of several types, including sinus tachycardia, atrioventricular nodal re-entrant tachycardia, atrial fibrillation, or atrial flutter. See also
Cardiac electrophysiology
Electrocardiogram
Electrophysiology study
Premature ventricular contraction
Wolff–Parkinson–White syndrome

References


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