2 months through 8 years (C&TC) or 3rd grade (Early Childhood and school screenings). Description : By noting the position of light being reflected in the pupils, the observer is able to check for a less obvious constant strabismus.
Preferential voting may refer to: 1  Ranked voting systems, all election methods that involve ranking candidates in order of preference. 2  Instant-runoff voting, referred to as preferential voting in Australia, is one type of ranked voting system.3  Range voting, in which voters assign points to each candidate. Ranked voting systems, all election methods that involve ranking candidates in order of preference. 2  Instant-runoff voting, referred to as preferential voting in Australia, is one type of ranked voting system. 3  Range voting, in which voters assign points to each candidate.
STV is the system of choice of groups such as the Proportional Representation Society of Australia (which calls it quota-preferential proportional representation), the Electoral Reform Society in the United Kingdom and FairVote in the USA (which calls it choice voting).TV systems primarily differ in how they transfer votes and the size of the quota used for determining winners. For this reason some have suggested that STV can be considered a family of voting systems rather than a single system. The Droop quota is the most commonly used quota.