Modern imaging modalities in the field of the retina have expanded our understanding of common pathologies including diabetic retinopathy (DR), age-related macular degeneration (AMD), central serous chorioretinopathy (CSCR), and many rare retinal diseases such as dystrophies, which were poorly understood before. This chapter describes newer emerging techniques in retinal imaging which enables adva...Read More
Articles
Lattice degeneration of the retina
Lattice degeneration is a vitreoretinal degenerative process of the peripheral retina with visible lesions that predispose to retinal tears and detachment. Vitreous traction at sites of significant vitreoretinal adhesion is responsible for most retinal breaks that lead to retinal detachment. GOALS of identifying the patients with risk of RD are: Identify patients at risk of RRD Examine patients wi...Read More
Persistent Fetal Vasculature Syndrome
It is a congenital ocular disorder where fetal vasculature persists. It can be either subtle (no disturbance in vision) or severe (profound visual loss) Anatomy The fetal vasculature is composed of two parts: Tunica vasculosa lentis: It is situated anteriorly encircling the lens. It has anterior and posterior divisions. Anterior division has additional attachments to the pupillary frill of the ir...Read More
Introduction Retinopathy of Prematurity (ROP) is a fibrovascular proliferative disorder, which affects the developing peripheral retinal vasculature of premature infants. It is an avoidable cause of blindness in children. The initial signs of ROP are detectable by a few weeks after birth, and the condition progresses rapidly thereafter. This means that screening has to be timely, and there is only...Read More
Pan Retinal Photocoagulation (PRP), Focal Laser & Photodynamic Therapy (PDT) Technique & Tips.
Introduction ‘LASER’ is acronym for “Light Amplification by Stimulated Emission Radiation.” This describes the emission process by which an intense beam of electromagnetic radiation is generated Basic Properties of Laser Always monochromatic (one wavelength) Collimated (all photons run parallel) & focused to a small point Coherent (always in same phase) Highest possible speed Physics Certain subst...Read More
Introduction Recent advances in the pathogenesis, classification, and surgical intervention of idiopathic macular holes have generated a renewed interest in this entity. Better indicators of the visual outcome, as well as refinements in the surgical technique, have led to improvements in the success of macular hole surgery. Clinical characterization and theories on the pathogenesis of macular hole...Read More
Introduction Retinal vein occlusion (RVO) is the second most common retinal vascular disease to cause visual loss in adults after diabetic retinopathy. RVO has been classified into two main types, namely Central retinal vein occlusion (CRVO), Branch retinal vein occlusion (BRVO), the latter being more prevalent. Hemi-retinal vein occlusion has been classified separately since pathogenetically they...Read More
Perfluorocarbons in Ophthalmology
INTRODUCTION Perfluorocarbon liquids (PFCLs) were first developed in 1970s as possible substitutes to erythrocytes[1],[2] because of their capacity to dissolve relatively large amounts of oxygen. Initial trials with these compounds focused on their feasibility to be used as blood substitutes. These experiments proved the biocompatibility of these compounds. Based on their properties, they were the...Read More
Optical Coherence Tomography- Evolution and Clinical Applications
1. Introduction Optical coherence tomography (OCT) is a noninvasive imaging modality that has revolutionized the practice of clinical ophthalmology over the past decade. OCT provides high-resolution cross-sectional images of the retina, optic nerve head and retinal nerve fibre layer (RNFL) unobtainable by any other current modality, and enables qualitative and quantitative evaluation. As opposed t...Read More
Macular Buckle Indications, Technique and Challenges
Macular Buckling (MB) is simply defined as a modified scleral buckle (SB) surgery where the sclera is remodeled to appose the retina to the sclero-choroidal complex thereby relieving the traction. Unlike conventional SB, where buckle element is placed circumferentially around the eyeball, MB element is placed behind the globe under macula indenting the sclera from posterior. MB has been tried by v...Read More