Open-angle glaucoma stems from a reduced outflow of aqueous humor and is amongst the most important causes of blindness. Symptoms such as peripheral vision loss may not be apparent until severe optic nerve damage occurs. The diagnosis is made by a thorough physical exam and use of various ophthalmological procedures.
Glaucoma is one of the leading causes of blindness in the general population, and open-angle glaucoma is the most common form   . Numerous risk factors for this disorder have been identified, including older age, genetic factors (a seven-fold increased risk is confirmed in the setting of a positive family history), trauma, use of corticosteroids (either topical or systemic), black race, and high intraocular pressure, which is considered to be the main event in the pathogenesis   . Unfortunately, one of the most prominent clinical features of glaucoma is that its symptoms appear only when substantial damage to the optic nerve and disk occurs  . In fact, open-angle glaucoma is usually diagnosed incidentally, when examination of the eye is performed due to other causes . Studies have shown that loss of more than 40% of optic nerve fibers is necessary to produce symptoms , and patients report a gradual loss of peripheral vision that is often perceived as tunnel vision  . In most patients, open- angle glaucoma appears bilaterally, and inability to perform daily activities, such as driving and newspaper reading is often a consequence of the reduced visual field, while some patients report missing stairs as well . Glaucoma invariably causes irreversible blindness in the absence of a timely diagnosis and an early appearance of vision-related symptoms must be taken seriously for that reason.
Jaw & Teeth
- Blurred Vision
A 24-hour IOP monitoring was performed before and after trabeculectomy on both eyes of 2 JOAG patients-one with transiently blurred vision early in the morning, the other with progression of visual field defect despite apparently well-controlled IOP. [ncbi.nlm.nih.gov]
Acute Angle Closure Glaucoma is one of the only types of glaucoma that produce distinct symptoms that include pain, light sensitivity, redness, blurred vision, colored haloes around lights, and nausea or vomiting. [bweyecenter.com]
The symptoms of an angle closure attack are red painful eye, blurred vision, nausea, vomiting, and headache. Angle closure is an eye emergency and needs to be treated as soon as possible. [sightmd.com]
Symptoms include severe pain and nausea, as well as redness of the eye and blurred vision. If you have these symptoms, you need to seek treatment immediately. Congenital glaucoma. [smartdraw.com]
- Visual Acuity Decreased
Her visual acuity decreased from age 10. Bilateral cataract was diagnosed at age 45, and she is currently legally blind. Patient IV.1, a female born in 1971, suffered a decrease in visual acuity from age 6. [jmg.bmj.com]
- Arcus Senilis
In addition to these features, hypermetropia, deep central corneal opacities, hazy corneal limbus, peripheral scleralization of the cornea and early arcus senilis can also be seen. [ncbi.nlm.nih.gov]
- Blue Sclera
Ocular findings include blue sclera, low ocular rigidity, and thin corneal thickness. However, there are no documented cases linking OI and primary open angle glaucoma (POAG). [ncbi.nlm.nih.gov]
- Chronic Progressive External Ophthalmoplegia
Kearns-Sayre syndrome is characterized by chronic progressive external ophthalmoplegia, tapetoretinal degeneration and severe generalized myopathy. We report on a 82-year-old male patient with Kearns-Sayre syndrome with open angle glaucoma. [ncbi.nlm.nih.gov]
The diagnostic workup of patients reporting vision impairment must start with a thorough patient history that can reveal the presence of risk factors and assess the course and progression of symptoms. A positive family history, previous eye-related disorders and potential use of corticosteroids must be noted. A physical examination including visual field examination should be performed. As symptoms may be absent in the early stages, direct ophthalmoscopy is also recommended as a mandatory part of primary practice   . A more detailed ophthalmoscopic examination, however, is required to confirm glaucoma and various non-invasive procedures and these may be   :
- Perimetry - Because of its ability to provide a direct view of the patient's visual fields, this computer-based procedure is considered to be the mainstay in diagnosis and management of glaucoma .
- Optical coherence tomography (OCT) - Used to assess the optic nerve head and the retina by creating cross-sectional images , OCT is also frequently implemented in glaucoma workup. A more advanced form possessing an increased resolution and faster scanning speed, spectral domain (SD)-OCT, was recently introduced in ophthalmology, providing an even better view of the damaged structures .
- Scanning laser polarimetry and ophthalmoscopy - Measurement of the optic nerve fiber thickness and quantitative detection of viable retinal cells is achieved by these methods, respectively, which may be quite useful when the disease is in its initial stages.
Treatment of atopic eyelid disease with topical tacrolimus, following corticosteroid discontinuation in a steroid responder patient with open-angle glaucoma, seems to be an effective alternative treatment to corticosteroids without the risk of IOP increase [ncbi.nlm.nih.gov]
We did identify some border line evidence for a positive influence of treatment on VF prognosis (OR 0.67, 95% CI 0.45 to 1.00) for the beta-blockers . [cochrane.org]
What Is the Prognosis for Primary Open-Angle Glaucoma? The prognosis is generally good for people with primary open-angle glaucoma. [emedicinehealth.com]
Treatment & Prognosis If glaucoma is detected early, you can prevent or lessen serious symptoms, such as vision loss. Damage caused by glaucoma is irreparable. Treatment only helps to control the condition and prevent further damage. [nvisioncenters.com]
(GRADE*: Level of evidence low, Strength of recommendation strong) Offer people the opportunity to discuss their diagnosis, referral, prognosis, treatment and discharge, and provide them with relevant information in an accessible format at initial and [college-optometrists.org]
The present report suggests that visual field defects atypical for glaucoma should be carefully scrutinized for other etiologies. [ncbi.nlm.nih.gov]
Etiology/Risk factors Pathophysiology Clinical features Diagnostics Treatment [amboss.com]
Etiology The final common pathway for all potential etiologies of POAG is optic nerve head damage. This is thought to be secondary to primarily ganglion cell axon loss, although loss of blood vessels and glial cells has also been observed. [eyewiki.aao.org]
Blasco Ibáñez 15, 46010 Valencia, Spain. [email protected] 5 CIBER Fisiopatología de la Obesidad y Nutrición, Instituto de Salud Carlos III, Calle Sinesio Delgado, 3, 28029 Madrid, Spain. [email protected] 6 Genetic & Molecular Epidemiology [ncbi.nlm.nih.gov]
Abstract Objective: To evaluate the clinical and epidemiological profile of patients with primary open-angle glaucoma. [scielo.br]
This finding may provide insight into the pathophysiology of angle closure and provide assistance in future diagnosis, prevention, and management of the angle-closure spectrum of disorders. Copyright 2017 Elsevier Inc. All rights reserved. [ncbi.nlm.nih.gov]
This video discusses the three main types of glaucoma—open-angle glaucoma, closed-angle glaucoma, and normal-tension glaucoma, as well as the pathophysiology, diagnosis, and treatment. Find our complete video library only on Osmosis Prime: . [youtube.com]
Author information 1 Genetic & Molecular Epidemiology Unit, Department of Preventive Medicine & Public Health, School of Medicine, University of Valencia, Avenida Vicente Blasco Ibáñez 15, 46010 Valencia, Spain. [email protected] 2 CIBER Fisiopatología [ncbi.nlm.nih.gov]
Early detection prevents major vision loss While you can’t prevent glaucoma, you can prevent major vision loss from this disease with early detection and treatment. Vision Loss from Glaucoma [nweyes.com]
Prevention Is Easy When it comes to preventing glaucoma, the best thing you can do is get regular eye examinations and glaucoma screenings from Eye and Lasik Center. [eyeandlasik.com]
- Weinreb RN, Khaw PT. Primary open-angle glaucoma. Lancet. 2004;363:1711–1720.
- Beidoe G, Mousa SA. Current primary open-angle glaucoma treatments and future directions. Clin Ophthalmol. 2012;6:1699-1707.
- Porter RS, Kaplan JL. Merck Manual of Diagnosis and Therapy. 19th Edition. Merck Sharp & Dohme Corp. Whitehouse Station, N.J; 2011.
- Weinreb RN, Aung T, Medeiros FA. The pathophysiology and treatment of glaucoma: a review. JAMA. 2014;14;311(18):1901-1111.
- Distelhorst JS, Hughes GM. Open-Angle Glaucoma. Am Fam Physician. 2003;67:1937–44.
- Hu CX, Zangalli C, Hsieh M, et al. What Do Patients With Glaucoma See? Visual Symptoms Reported by Patients With Glaucoma. Am J Med Sci. 2014;348(5):403-409.
- Bussel II, Wollstein G, Schuman JS. OCT for glaucoma diagnosis, screening and detection of glaucoma progression. Br J Ophthalmol. 2014;98(2):ii15-ii19.