Equine Ophthalmology for the Equine Practitioner

ISBN-13: 9781591610403 / Angielski / Mixed media product / 2008 / 274 str.

Dennis E. Brooks

Opis

Helps veterinarians treat simple and complex eye problems in horses. This book focuses on salient clinical facts, covering the common medical and surgical ophthalmic problems encountered in an equine clinic.

Spis treści

ContentsSection 1 General Anatomy and Physiology of the Horse EyeIntroduction 3Some Helpful Hints 3AnatomyOrbit 4Eyelids 6Nictitans 8Conjunctiva 8Anterior Segment 8Precorneal Tear Film 8Cornea, Limbus, Sclera 9Iridocorneal Angle 11Uvea 11Iris 11Pupil 12Ciliary Body 13Choroid 13Lens 13Posterior Segment 14Vitreous Chamber 14Retina 14Optic Nerve 15Section 2 Examination of the Eye of the HorseHistory 18Ophthalmic Examination 18Reflex Testing 18Diagnostic Testing 19What does the Horse See? Visual Capabilities of the Horse 33Ocular Problems in the Foal 36Section 3 The Equine OrbitOrbital Diagnostic Techniques 48Orbital Trauma, Contusion and Periorbital Fractures 50Foreign Bodies can lead to Orbital Abscesses 52Orbital Tumors 52Suture Line Periostitis 54Treatment of Equine Orbital Disease 54Section 4 The Eyelids, Conjunctiva and Lacrimal SystemTraumatic Eyelid Lacerations 60Neoplasia of the Lids 65The Conjunctiva 72Nictitans 76The Nasolacrimal System 77Keratoconjunctivitis Sicca (KCS) 78Dacryocystitis 79Section 5 Corneal UlcerationCorneal Ulceration 86Proteinases in the Tear Film 112Corneal Sensitivity in Foals and Adult Horses 113Corneal Healing in the Horse 114The Equine Corneal Microenvironment 115Medical Therapy 118Antibiotics 119Collagenolysis Prevention 119Treat Uveitis 120Adjunctive Surgical Therapy 120**Important Concepts** 127Corneal Lacerations/Perforations 128Fungal Ulcers in Horses 130Iris Prolapse in the Horse 131Corneal Stromal Abscesses 132Section 6 Other Corneal ProblemsCorneal Edema 154Squamous Cell Carcinoma and other Corneal Tumors 154Corneal Foreign Bodies 156Endothelial Detachment following Blunt Trauma 158Nonulcerative Keratouveitis (NKU) 158Nonulcerative Interstitial Keratitis (NIK) 158Eosinophilic Keratoconjunctivitis 160Herpes and Viral Keratitis 162Burdock Pappus Bristle Keratopathy 164Calcific Band Keratopathy 164Section 7 Cataracts, Glaucoma and Uveal Problems in the HorseCataracts 170Equine Cataract Surgery 175Extracapsular Cataract Surgery 175Phacoemulsification Cataract Surgery 175Intracapsular Cataract Surgery 179Postoperative Cataract Surgery Therapy and Results 179Aphakic Vision in Horses 180Equine Glaucomas 181Contraindications/Possible Interactions 189Tips on Tonometry for Evaluation of Intraocular Pressure (IOP) in Horses 189The Uveal Tract 190Heterochromia Iridis 190Aniridia/Iris Hypoplasia/Enlarged Corpora Nigra/Iris Colobomas 191Iris and Ciliary Body Cysts 191Equine Recurrent Uveitis (Periodic Ophthalmia, Moon Blindness, Iridocyclitis 192ERU Therapy 200Some Horses require Life-Long Therapy! 200Alternative Therapy for ERU 203Surgical considerations for ERU 203Section 8 Retinopathies and Ocular Manifestations of Systemic Diseases in the HorseRetinopathies 208Chorioretinitis 208Congenital Stationary Night Blindness 211Equine Motor Neuron Disease Retinopathy 211Retinal Detachments 211Optic Neuropathies 213Bacterial Infections 219Viral Infections 221Chlamydial Infections 223Fungal Infections 223Protozoan Infections 224Neoplasia 224Unknowns 225Eye Diseases associated with Specific Horse Breeds 226Links 229Electroretinography 229Lavage Treatment Systems 231Glossary of Selected Veterinary Ophthalmic Terms 232Treatment Plans/Practice Tips 240Index 255