The Experts below are selected from a list of 312 Experts worldwide ranked by ideXlab platform

John F. Salmon - One of the best experts on this subject based on the ideXlab platform.

  • Predisposing factors for chronic Angle-Closure Glaucoma.
    Progress in retinal and eye research, 1999
    Co-Authors: John F. Salmon
    Abstract:

    Chronic Angle-Closure Glaucoma is the commonest form of Glaucoma in Sino Mongaloid populations. It is an anatomical disorder of the anterior segment of the eye characterised by permanent closure of part of the filtration angle as a result of iris apposition to the trabecular meshwork. Two pathways lead to this condition: recurrent pupillary block and "creeping" angle closure. East or Southeast Asian ethnic background is an important risk factor for the development of chronic Angle-Closure Glaucoma. Other demographical risk factors include ageing, female gender and a familial tendency. Eyes with chronic Angle-Closure Glaucoma have different anterior segment anatomical relationships when compared to normals. Those eyes at risk tend to be hypermetropic with a shallow anterior chamber, a relatively anteriorly positioned lens and a short axial length. The role of the ciliary body anatomy and ciliary processes in the pathogenesis of this condition requires further investigation.

  • Cavernous-dural Fistula With Secondary Angle-Closure Glaucoma
    American journal of ophthalmology, 1997
    Co-Authors: S. James Talks, John F. Salmon, John S. Elston, Anthony J. Bron
    Abstract:

    Purpose To report a rare case of Angle-Closure Glaucoma, secondary to the rapid development of a choroidal effusion, in a patient with a long-standing cavernous-dural shunt. Methods Case report. Investigations included computed tomographic scan, magnetic resonance imaging, and carotid angiography. Results The development of the choroidal effusion occurred because of partial thrombosis of the ipsilateral superior ophthalmic vein and cavernous sinus. Drainage of the choroidal effusion resolved the Angle-Closure Glaucoma. Conclusions The combination of worsening signs and evidence of thrombosis indicates impending resolution of a cavernous-dural shunt. However, if a choroidal effusion causes Angle-Closure Glaucoma, prompt surgical drainage should be considered to prevent permanent peripheral anterior synechiae formation, with the expectation that the effusion will not recur.

  • The role of ethnicity in primary Angle-Closure Glaucoma.
    South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde, 1994
    Co-Authors: John F. Salmon, R Martell
    Abstract:

    Primary Angle-Closure Glaucoma is significantly more common than primary open-angle Glaucoma in the East, whereas in Africa and Europe the reverse is true. In order to study the role of ethnic background in the frequency of primary Angle-Closure Glaucoma in Cape Town and, in particular, in people of mixed ethnic background, the so-called 'coloureds', we retrospectively reviewed all patients with primary Glaucoma who attended the Glaucoma clinic at Groote Schuur Hospital during a 30-month period. Primary Angle-Closure Glaucoma was diagnosed in 11 of 63 (17%) whites, 11 of 85 (13%) blacks and 114 of 244 (46,7%) coloureds with primary Glaucoma; the difference is statistically highly significant ( P < 0,001). The human leucocyte antigen frequencies in 97 coloured patients with primary Angle-Closure Glaucoma were similar to those found in a control group of individuals with a similar ethnic background. This study highlights the fact that coloureds are more predisposed to primary angleclosure Glaucoma than whites or blacks. Because of their strong historical and genetic ties with south-east Asia, this greater prevalence of primary Angle-Closure Glaucoma might be explained by an Eastern influence on the ocular structures of the eye, as opposed to an African or European influence.

  • The Dimensions of Eyes with Chronic Angle-Closure Glaucoma.
    Journal of glaucoma, 1994
    Co-Authors: John F. Salmon, Sonja A. Swanevelder, Margaret A. Donald
    Abstract:

    The measurement of eyes with primary Angle-Closure Glaucoma has been comprehensively documented in people of European ethnic origin. In comparison, few biometric studies have examined the relationship of one intraocular structure to another in people of Oriental or African ethnic background with primary Angle-Closure Glaucoma. To determine the ocular characteristics of people with this ethnic background suffering from chronic angleclosure glacoma, both eyes of 46 patients with chronic Angle-Closure Glaucoma were measured by contact A-scan ultrasonography, and the measurements were compared with those found in two groups of 23 matched normals. The correlation between the measurements obtained in the right and left eyes in each group was statistically significant (p < 0.001). Although the mean axial length was less (22.43 mm vs. 23.17 and 23.25 mm, p = 0.0001), the mean anterior chamber depth shallower (2.48 mm vs. 2.80 and 2.81 mm, p < 0.001). and the mean "relative lens position'' more anterior in eyes with chronic Angle-Closure Glaucoma compared with normal, the mean lens thickness in all three groups was similar (4.73 mm). These measurements are significantly different from those reported in other ethnic groups. In comparison with the previously reported findings in Europeans, an anterior lens position without significant lens enlargement is responsible for the crowded anterior segment in our patients with chronic Angle-Closure Glaucoma.

David A. Quillen - One of the best experts on this subject based on the ideXlab platform.

  • Topiramate Induced Acute Angle Closure Glaucoma
    The open ophthalmology journal, 2008
    Co-Authors: A Aminlari, M East, W Wei, David A. Quillen
    Abstract:

    Topiramate is an oral sulphamate medication primarily used for seizure, migraine and neuropathic pain. It has been associated with secondary angle closure, which can mimic acute angle closure Glaucoma. Suspicion for medication induced angle closure Glaucoma should be higher whenever angle closure presents bilaterally. We present two cases of bilateral angle closure Glaucoma secondary to topiramate.

E. C. Chua - One of the best experts on this subject based on the ideXlab platform.

  • Hypopyon — an unusual sign in acute Angle-Closure Glaucoma
    International Ophthalmology, 1993
    Co-Authors: K. G. Au Eong, E. C. Chua
    Abstract:

    The appearance of a hypopyon is an extremely uncommon finding in acute Angle-Closure Glaucoma and only a few cases have been previously reported in the literature. We report a fifty-year-old female who, following a recent bereavement, presented with classical features of acute Angle-Closure Glaucoma and a hypopyon. The eye developed a glaukomflecken and the patient underwent trabeculectomy, extracapsular cataract extraction and intraocular lens implantation with good post-operative results. Because hypopyon in acute Angle-Closure Glaucoma is rare and may cause diagnostic confusion and hence therapeutic difficulties, this case is described to highlight this unusual clinical sign.

  • Hypopyon--an unusual sign in acute Angle-Closure Glaucoma.
    International ophthalmology, 1993
    Co-Authors: K. G. Au Eong, E. C. Chua, Chee-chew Yip, Y. Tun, Arthur S. M. Lim
    Abstract:

    The appearance of a hypopyon is an extremely uncommon finding in acute Angle-Closure Glaucoma and only a few cases have been previously reported in the literature. We report a fifty-year-old female who, following a recent bereavement, presented with classical features of acute Angle-Closure Glaucoma and a hypopyon. The eye developed a glaukomflecken and the patient underwent trabeculectomy, extracapsular cataract extraction and intraocular lens implantation with good post-operative results. Because hypopyon in acute Angle-Closure Glaucoma is rare and may cause diagnostic confusion and hence therapeutic difficulties, this case is described to highlight this unusual clinical sign.

Shigeo Tsukahara - One of the best experts on this subject based on the ideXlab platform.

  • Ultrasound biomicroscopy of angle closure Glaucoma with pseudoexfoliation syndrome
    The British journal of ophthalmology, 1997
    Co-Authors: Takashi Gohdo, Hiroshi Takahashi, Hiroyuki Iijima, Shigeo Tsukahara
    Abstract:

    Editor,—The pseudoexfoliation syndrome is characterised by the presence of light grey or white flakes on the pupillary margin and anterior lens capsule, the surfaces of the iris, zonules, ciliary body, hyaloid, trabecular meshwork, and the endothelial surface of the cornea. This syndrome is generally thought to be accompanied by open angle Glaucoma. However, in some reports, the anterior chamber angle is narrow,1-3 and in other cases shown to be angle closure Glaucoma.45 The relation between the pseudoexfoliation syndrome and angle closure Glaucoma is unclear. We used the ultrasound biomicroscope to determine the pathogenesis of angle closure Glaucoma in a patient with the pseudoexfoliation syndrome. ### CASE REPORT An 80-year-old Japanese woman complained of blurred vision and pain in the left eye. Angle closure Glaucoma of the left eye was diagnosed by an ophthalmologist. Pilocarpine eye drops were prescribed, …

K. G. Au Eong - One of the best experts on this subject based on the ideXlab platform.

  • Hypopyon — an unusual sign in acute Angle-Closure Glaucoma
    International Ophthalmology, 1993
    Co-Authors: K. G. Au Eong, E. C. Chua
    Abstract:

    The appearance of a hypopyon is an extremely uncommon finding in acute Angle-Closure Glaucoma and only a few cases have been previously reported in the literature. We report a fifty-year-old female who, following a recent bereavement, presented with classical features of acute Angle-Closure Glaucoma and a hypopyon. The eye developed a glaukomflecken and the patient underwent trabeculectomy, extracapsular cataract extraction and intraocular lens implantation with good post-operative results. Because hypopyon in acute Angle-Closure Glaucoma is rare and may cause diagnostic confusion and hence therapeutic difficulties, this case is described to highlight this unusual clinical sign.

  • Hypopyon--an unusual sign in acute Angle-Closure Glaucoma.
    International ophthalmology, 1993
    Co-Authors: K. G. Au Eong, E. C. Chua, Chee-chew Yip, Y. Tun, Arthur S. M. Lim
    Abstract:

    The appearance of a hypopyon is an extremely uncommon finding in acute Angle-Closure Glaucoma and only a few cases have been previously reported in the literature. We report a fifty-year-old female who, following a recent bereavement, presented with classical features of acute Angle-Closure Glaucoma and a hypopyon. The eye developed a glaukomflecken and the patient underwent trabeculectomy, extracapsular cataract extraction and intraocular lens implantation with good post-operative results. Because hypopyon in acute Angle-Closure Glaucoma is rare and may cause diagnostic confusion and hence therapeutic difficulties, this case is described to highlight this unusual clinical sign.