References

http://www.westmetroeye.com/Disorders/Horners_syndrome.html
http://www.fpnotebook.com/Neuro/Autonomic/HrnrsSyndrm.html
http://www.umm.edu/ency/article/000708.htm
http://www.rarediseases.org/search/rdbdetail_abstract.html?disname=Horner
http://www.britannica.com/EBchecked/topic/199272/eye/64951/Pupillary-pathways
http://emedicine.medscape.com/article/1220091-overview
http://emedicine.medscape.com/article/279394-overview
http://www.nlm.nih.gov/medlineplus/ency/article/000708.htm
http://images.google.com.sg/images?sourceid=navclient&rlz=1T4ADBF_en___SG332&q=visual+pathway&um=1&ie=UTF-8&ei=EHaOS4f3OpKmrQfRr4DRCw&sa=X&oi=image_result_group&ct=title&resnum=1&ved=0CBUQsAQwAA