Chapter 1: Ophthalmology and Otolaryngology

The ophthalmology section addresses ocular emergencies and common pathologies, including traumatic injuries such as penetrating wounds and orbital fractures requiring urgent intervention, corneal pathology encompassing abrasions and infectious ulcerations, retinal disorders including detachment and age-related macular degeneration, and glaucoma presentations ranging from acute angle-closure crises to chronic open-angle disease. Infectious conditions like bacterial and viral conjunctivitis and orbital cellulitis are covered alongside their diagnostic criteria and management strategies. The otolaryngology content examines auditory disorders including conductive versus sensorineural hearing loss, Ménière disease with its triad of vertigo, tinnitus, and fluctuating hearing, and otitis media in acute and chronic presentations. Vestibular dysfunction from conditions like labyrinthitis and vestibular neuritis are distinguished from central causes of vertigo. Sinonasal pathology encompasses acute and chronic sinusitis, allergic and vasomotor rhinitis, and serious upper airway emergencies including epiglottitis and peritonsillar abscess. Oral conditions such as aphthous ulcers, oral candidiasis, and leukoplakia are discussed within their clinical contexts. The pulmonology section addresses both chronic airway diseases and acute respiratory emergencies, including asthma pathophysiology and management, chronic obstructive pulmonary disease encompassing emphysema and chronic bronchitis, pneumonia across bacterial, viral, and fungal etiologies, and life-threatening conditions such as spontaneous pneumothorax and pulmonary embolism. Throughout, the chapter emphasizes diagnostic approaches, clinical presentation patterns, and evidence-based management protocols essential for clinical practice and examination success.