This book is the first of the ophthalmology series published by lecturers in the Ophthalmology Department, UNIMAS. It is written specially for medical doctors who are preparing to take the Basic Sciences Examination in Ophthalmology. The passing of this examination is essential for doctors who wish to enter the Malaysian Universities’ Masters Programme in Ophthalmology. For those doctors who are already in the Programme, the questions are useful for those who are preparing for the Basic Sciences components of MRCS Ophth. (Membership of the Royal College of Surgeons in Ophthalmology), MRCOphth (Membership of the Royal College of Ophthalmologists) or MRCS (Membership of the Royal College of Surgeons).