The sixth edition has been thoroughly revised, updated and reorganized into a new layout with six sections: 1. Section I: Anatomy and Physiology of Eye includes two chapters, one each on Anatomical and Physiological aspects of Eye and Ocular Adnexa. 2. Section II: Optics and Refraction comprises of two chapters, one each on Elementary and Physiological Optics, and Error of Refraction and Accommodations. 3. Section III: Diseases of the Eye exhibits an exhaustive and thorough exposition of the text on disorders of eyeball, ocular adnexa and visual pathway in fourteen chapters. 4. Section IV: Ocular Therapeutics includes a chapter on Ocular Pharmacology and another chapter on Lasers and Cryotherapy in Ophthalmology. 5. Section V: Systemic and Community Ophthalmology covers updated text on these topics in two chapters. 6. Section VI: Practical Ophthalmology provides the exact scheme, pattern and readymade material on each aspect of the practical examinations in four chapters.