Broadband access connections can use a direct connection or some form of tunneled protocol such as PPP or L2TP to connect the CPE to the Internet. The service provider must secure its own network infrastructure when providing IPv6 services. Figure 3-5 shows several broadband access provider network topologies.
The list of signs and symptoms mentioned in various sources for Coloboma of iris includes the 7 symptoms listed below: Hole in the iris. Unusual shaped pupil. Blurred vision. Impaired vision. Impaired central vision. Asymptomatic. Light sensitivity.
Congenital coloboma can occur as an isolated condition or as part of a number of different syndromes involving neurological, craniofacial and systemic developmental defects. Visual prognosis varies according to the severity and site of the ocular malformation. Coloboma is an important cause of childhood visual impairment and blindness. Epidemiology