the intraocular pressure fluctuation. Sudden increase of intraocular pressure can lead to intraocular micro barotrauma and cause ischemic effects and mechanical stress to retinal nerve fiber layer. Sudden intraocular pressure drop can lead to intraocular decompression that generates micro bubbles that potentially cause multiple micro emboli and leading to hypoxia, ischemia and retinal micro structure damage. References External links www.allaboutvision.com What To Expect During a Comprehensive Eye Exam www.emedicinehealth.com Ocular Hypertension www.tonometerdiaton.com Transpalpebral Transscleral Tonometry www.almagia.com Almagia International Ophthalmology Eye Vision