Displaying publications 1 - 20 of 24 in total

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  1. Bílý S, Nakládal O
    Zookeys, 2011.
    PMID: 21998499 DOI: 10.3897/zookeys.116.1403
    Descriptions of four new species of the genus Philanthaxia Deyrolle, 1864: Philanthaxia pseudoaeneasp. n. (Thailand), Philanthaxia jaklisp. n. (Indonesia, Sumatra), Philanthaxia chalcogenioidessp. n. (Indonesia, Sabah) and Philanthaxia lombokanasp. n. (Indonesia, Lombok) are given. The new species and male genitalia are illustrated and compared with the most similar congeners. Sexual dimorphism of Philanthaxia iris Obenberger, 1938 is described and discussed.
    Matched MeSH terms: Iris; Iris Plant
  2. Bastion ML, Then KY, Faridah HA, Mushawiahti M, Othmaliza O, Wong HS
    Med J Malaysia, 2011 Mar;66(1):10-4.
    PMID: 23765135 MyJurnal
    This retrospective study investigated the role of antivascular endothelial growth factor agents (VEGF), ranibizumab, bevacizumab and pegaptanib sodium in patients with iris neovascularisation (INV), in which 9 eyes received intraocular injections for various ischaemic ocular conditions. Ocular sequelae included recurrence of rubeosis (n=2) and hyphaema (n=2). Systemic complication included one case of cerebrovascular accident. INV regressed in all cases from day one. INV recurrence occurred in 2 cases. The mean intraocular pressure of the study eyes decreased from 25.3 mmHg to 18.3 mmHg at one month. Five eyes are medication free. Visual acuity improved in 5 eyes. Four eyes achieved a Snellen visual acuity of 6/24 or better. We conclude that the use of intraocular anti-VEGF agents are safe and effective for inducing the regression of INV. Patients with multiple systemic risk factors should be counseled on stroke risk.
    Matched MeSH terms: Iris
  3. Deva JP
    Med J Malaysia, 1977 Mar;31(3):241-3.
    PMID: 904520
    Matched MeSH terms: Iris*
  4. Singh K
    Med J Malaysia, 1976 Sep;31(1):38-41.
    PMID: 1088175
    Matched MeSH terms: Iris/surgery
  5. Khade S, Gite S, Thepade SD, Pradhan B, Alamri A
    Sensors (Basel), 2021 Nov 08;21(21).
    PMID: 34770715 DOI: 10.3390/s21217408
    Iris biometric detection provides contactless authentication, preventing the spread of COVID-19-like contagious diseases. However, these systems are prone to spoofing attacks attempted with the help of contact lenses, replayed video, and print attacks, making them vulnerable and unsafe. This paper proposes the iris liveness detection (ILD) method to mitigate spoofing attacks, taking global-level features of Thepade's sorted block truncation coding (TSBTC) and local-level features of the gray-level co-occurrence matrix (GLCM) of the iris image. Thepade's SBTC extracts global color texture content as features, and GLCM extracts local fine-texture details. The fusion of global and local content presentation may help distinguish between live and non-live iris samples. The fusion of Thepade's SBTC with GLCM features is considered in experimental validations of the proposed method. The features are used to train nine assorted machine learning classifiers, including naïve Bayes (NB), decision tree (J48), support vector machine (SVM), random forest (RF), multilayer perceptron (MLP), and ensembles (SVM + RF + NB, SVM + RF + RT, RF + SVM + MLP, J48 + RF + MLP) for ILD. Accuracy, precision, recall, and F-measure are used to evaluate the performance of the projected ILD variants. The experimentation was carried out on four standard benchmark datasets, and our proposed model showed improved results with the feature fusion approach. The proposed fusion approach gave 99.68% accuracy using the RF + J48 + MLP ensemble of classifiers, immediately followed by the RF algorithm, which gave 95.57%. The better capability of iris liveness detection will improve human-computer interaction and security in the cyber-physical space by improving person validation.
    Matched MeSH terms: Iris
  6. Hui-hui Wang, Jing-lan Liu, Rong Zhang, Jia-kai Liu, Yu-qi Zou, Zhen-ming Zhang
    Sains Malaysiana, 2017;46:2375-2381.
    This paper had selected watermifoil (Myriophyllum veticillatum Linn.), softstem bulrush (Scirpus validus Vahl) and yellow-flowered iris (Iris wilsonii), in showing the water purification through different configuration. AFIs with different combination of aquatic plants were set up to purify the water quality for 50 days. This paper aimed to evaluate chemical and vegetative characteristics of each type of plant and also to find configuration of aquatic plants to maximize the contaminants removal efficiency by artificial floating island (AFI). The result indicated that the trophic waterbody promote the growth of plants and all of the AFIs have the ability to purify water and reduce contaminants. However, the most effective way is by combination of these three aquatic plants which has strong capacity to remove COD, NO3-, total nitrogen, total phosphorous and improve pH levels. Watermifoil (Myriophyllum verticillatum Linn.) is better than yellow-flowered iris (Iris wilsonii) and softstem bulrush (Scirpus validus Vahl) in disposing water pollutants.
    Matched MeSH terms: Iris Plant
  7. Muhamad Imran Abdulah, Ikmal Abdul Hakim, Rosni Amin, Rosliza Parumo, Ma, Bee Chai, Noraziyah Abdul Aziz, et al.
    Q Bulletin, 2020;1(29):16-27.
    MyJurnal
    The Department of Oral & Maxillofacial Surgery at Hospital Sultanah Aminah, Johor Bahru started managing patients who lost their eyeballs with ocular prosthesis in 2013. Unfortunately, there was an increasing trend of failed ocular prosthesis from 2013-2015. The failure rate went from 28.6% in 2013 to 40% in 2014 and increased to 44.4% in 2015. Failed ocular prosthesis not only leads to dissatisfied patients but also an increase in cost due to redoing of prosthesis. The objective of this project was to reduce the incidence rate of failed ocular prosthesis. A failed case is when the prosthesis does not pass the issue stage and has to be redone from the beginning. The standard failure rate is 0%, as the average number of cases per year is only about 10 cases. We determined the contributing factors of failed ocular prosthesis by analysing retrospective data from patients’ dental and lab records. This was followed by a self-administered questionnaire on reasons for failed cases which was distributed among the dentists and lab technicians in our department. The contributing factors that were identified included insufficient knowledge or skill of dentist and lab technicians in the construction of the ocular prosthesis, as well as improper screening of new cases which was the main factor of all the failed cases. The strategies for change included improving the process of care by creating a checklist for proper screening of new patients, mentoring of new staff, and continuous training on construction of ocular prosthesis, Fabricated Iris Mould innovation technique and early referral for insertion of eye conformer. The interventions that were implemented reduced the failure rate to 20% in 2016 followed by 0% in 2017, 2018 and 2019. Ongoing efforts are being done to replicate this project in other Oral & Maxillofacial Surgery clinics in Johor.
    Matched MeSH terms: Iris
  8. Saniasiaya J
    Postgrad Med J, 2020 11;96(1141):721.
    PMID: 32144119 DOI: 10.1136/postgradmedj-2020-137621
    Matched MeSH terms: Iris Diseases*
  9. Syazwan Hafiz Mohd, Wan Elhami Wan Omar, Ai-Hong Chen
    MyJurnal
    This paper examines the chemical elements used as colour additives in cosmetic coloured contact lenses (Cos-CCL) using Field Emission Scanning Electron Microscope equipped with Energy Dispersive X-ray Spectroscopy (FESEM-EDX) analysis. The samples comprised two different Cos-CCL brands and colours (sample A1-black iris colour & B1-gray iris colour) with their respective clear contact lens counterparts as controls (sample A2 & B2). The parameters of Cos-CCL were observed carefully so that they resembled their respective controls. All the samples were analysed for chemical element characterisation by using EDX spectroscopy surface mapping analysis on both front and back surfaces. EDX spectroscopy point analysis was done on cross-section surface of Cos-CCL when colour additive pattern could not be detected by FESEM on either surface. FESEM-EDX spectroscopy analysis has revealed iron element in the colour additives of the A1 sample and aluminium elements in the B2 sample. These two elements were not present in the respective control samples. It can be concluded that iron and aluminium elements are exclusively attributed to the colour additive in Cos-CCL samples. It is important for manufacturers of Cos-CCL to disclose information of their products and create greater awareness on the risks facing users.
    Matched MeSH terms: Iris; Iris Plant
  10. Shahrizan Jamaludin, Nasharuddin Zainal, W. Mimi Diyana W. Zaki
    MyJurnal
    Iris recognition has become a widely popular biometric system. The stable textures and features of the human iris have made such biometric systems efficient and accurate for purposes of verification and identification. The term non-ideal iris refers to a situation in which the iris is occluded by noise, including reflections, eyelashes, eyelids and so on. Most current iris recognition algorithms assume that the iris is not occluded, which is less accurate. A method using only some parts of the iris may be suitable to deal with a non-ideal iris. The current application of iris recognition systems are plagued by weaknesses such as slow processing times, especially when dealing with many irises. In this study, a sub-iris recognition technique is proposed to deal with the non-ideal iris, while reducing execution time via an embedded system using a graphical processing unit (GPU). The experiment revealed that the proposed method was accurate and fast.
    Matched MeSH terms: Iris
  11. Bukvički D, Novaković M, Ab Ghani N, Marin PD, Asakawa Y
    Nat Prod Res, 2018 Aug;32(15):1849-1852.
    PMID: 29126369 DOI: 10.1080/14786419.2017.1402309
    This manuscript describes the first detailed chemical investigation of endemic species Iris adriatica, including isolation and structure elucidation. Chemical analyses of the rhizome CH2Cl2/MeOH (2:1) extract revealed fourteen secondary metabolites, mainly isoflavonoids. Among isoflavonoids, two groups have been found: nigricin-type and tectorigenin-type. Dominant group of the isolated compounds has been nigricin-type isoflavones: nigricin, nigricin-4'-(1-O-β-D-glucopyranoside) and nigricin-4'-(1-O-β-D-glucopyranosyl (1-6)-β-D-glucopyranoside) with 2.5, 10 and 1% of the total extract, respectively. Irisxanthone - xanthone C-glucoside, β-sitosterol, benzophenone and one of its derivatives have also been found. Nigricin-type isoflavonoids and irisxanthone can be considered as possible chemotaxonomic markers for I. adriatica. 5,3',5'-Trimethoxy-6,7-methylenedioxyisoflavone-4'-(1-O-β-D-glucopyranoside) and benzophenone have been isolated from Iris species for the first time.
    Matched MeSH terms: Iris Plant/metabolism*; Iris Plant/chemistry*
  12. Bariah Mohd-Ali, Muhammad Afzam Shah Abdul-Rahim, Zainora Mohammed, Norhani Mohidin
    MyJurnal
    Kajian terdahulu banyak menunjukkan perbezaan dalam dimensi okular mengikut kaum. Walau bagaimanapun hanya terdapat sedikit data mengenai dimensi okular bangsa Melayu di Malaysia yang dilaporkan. Kajian ini bertujuan untuk menetapkan nilai normal dimensi okular bangsa Melayu muda di Malaysia. Seramai 584 orang telah diundang untuk menjadi subjek untuk kajian secara sukarela. Pengukuran yang dilakukan meliputi kelengkungan dan ketebalan tengah kornea, nilai esentrisiti kornea (e), diameter iris horizontal dan vertikal yang kelihatan, saiz pupil dan bukaan palpebral. Subjek dibahagikan kepada 3 kumpulan berikut mengikut umur dan dipadankan mengikut jantina dan umur: Kumpulan 1 (7-12 tahun, n = 188), Kumpulan 2 (13 to 18 tahun, n = 196) and Kumpulan 3 (19 to 24 tahun, n = 200). Pengukuran dilakukan menggunakan topografer kornea (CTK 922 dari Haag Streit, Jerman), pakometer ultrasonik (Corneo-Gage Plus 2 dari Sonogage Incorporated) dan auto refraktometer (Auto-Ref R1 dari Canon, Jepun). Dimensi okular bangsa Melayu yang diukur didapati lebih kecil dari bangsa lain di seluruh dunia. Perbezaan yang signifikan juga didapati untuk semua pengukuran dengan peningkatan umur (p < 0.05). Keputusan kajian ini boleh dijadikan rujukan untuk nilai dimensi okular populasi Melayu muda Malaysia di masa hadapan.
    Matched MeSH terms: Iris; Iris Plant
  13. Chew C, Rahman RA, Shafie SM, Mohamad Z
    J Pediatr Ophthalmol Strabismus, 2005 6 28;42(3):166-73.
    PMID: 15977870
    PURPOSE: To determine the mydriatic regimen that provides optimal dilation of the pupil with minimal systemic side effects for screening of retinopathy of prematurity.

    METHODS: This cross-sectional, randomized, double-masked clinical trial compared cyclopentolate 1% + phenylephrine 2.5%, tropicamide 1% + phenylephrine 2.5%, and a prepared combination of cyclopentolate 0.2% with phenylephrine 1% for pupillary dilation in preterm infants with dark irides. Thirteen infants were randomized to each regimen. Outcomes measured were pupillary dilation, heart rate, blood pressure, abdominal girth, and intolerance to feeds.

    RESULTS: All three mydriatic regimens provided adequate pupillary dilation at 45 minutes, with dilation sustained at 60 minutes. There was a significant increase in mean blood pressure in the cyclopentolate 1% + phenylephrine 2.5% and the tropicamide 1% + phenylephrine 2.5% groups. Although there was no significant change of abdominal girth in any of the three groups, a total of eight patients developed intolerance to feeds; four (50%) of these infants were from the cyclopentolate 1% + phenylephrine 2.5% group.

    CONCLUSION: The prepared combination of cyclopentolate 0.2% + phenylephrine 1% appears to be the mydriatic of choice for preterm infants with dark irides as it provided adequate pupillary dilation with the least systemic side effects.

    Matched MeSH terms: Iris/drug effects*
  14. Malisa, A., Mae-Lynn, C.B.
    MyJurnal
    A 37-year-old Malay woman presented with progressive deterioration in vision and was diagnosed with advanced proliferative diabetic retinopathy with neovascular glaucoma. Intravitreal ranibizumab injection (an anti-vascular endothelial growth factor) was administered prior to vitrectomy. Slit lamp assessment 2 days post-injection revealed significant regression of both iris and retinal neovascularisation. This resulted in adequate reduction of intra-ocular pressure prior to surgery. In addition, the regression of retinal vessels reduced the risk of intra-operative haemorrhage, thus aiding the surgical excision of the fibrovascular membranes. Periodic post-operative assessment in the first 3 weeks showed minimal inflammation and no recurrence of vitreous haemorrhage. This case illustrates that intravitreal ranibizumab has a role as an adjunct therapy prior to diabetic vitrectomy to significantly reduce the risk of intra-ocular haemorrhage.
    Matched MeSH terms: Iris
  15. Pandurangan DK, Bodagala P, Palanirajan VK, Govindaraj S
    Int J Pharm Investig, 2016 Jan-Mar;6(1):56-62.
    PMID: 27014620 DOI: 10.4103/2230-973X.176488
    In the present investigation, solid lipid nanoparticles (SLNs)-loaded in situ gel with voriconazole drug was formulated. Further, the formulation was characterized for pH, gelling capacity, entrapment efficiency, in vitro drug release, drug content, and viscosity. Voriconazole is an antifungal drug used to treat various infections caused by yeast or other types of fungi. Film hydration technique was used to prepared SLNs from lecithin and cholesterol. Based on the entrapment efficiency 67.2-97.3% and drug release, the optimized formulation NF1 of SLNs was incorporated into in situ gels. The in situ gels were prepared using viscosity-enhancing polymers such as Carbopol and (hydroxypropyl)methyl cellulose (HPMC). Formulated SLN in situ gel formulations were characterized, which showed pH 4.9-7.1, drug content 65.69-96.3%, and viscosity (100 rpm) 120-620 cps. From the characterizations given above, F6 was optimized and evaluated for microbial assay and ocular irritation studies. Microbial assay was conducted by the cup-plate method using Candida albicans as the test organism. An ocular irritation study was conducted on albino rabbits. The results revealed that there was no ocular damage to the cornea, conjunctiva, or iris. Stability studies were carried out on the F6 formulation for 3 months, which showed that the formulation had good stability. These results indicate that the studied SLNs-loaded in situ gel is a promising vehicle for ocular delivery.
    Matched MeSH terms: Iris
  16. Kuganasan S, Voon Loo A, Subrayan V
    Clin Exp Optom, 2015 Jan;98(1):97-8.
    PMID: 25545950 DOI: 10.1111/cxo.12235
    Matched MeSH terms: Iris/pathology*; Iris Diseases/diagnosis; Iris Diseases/etiology*
  17. Bastion ML
    BMJ Case Rep, 2010;2010.
    PMID: 22242074 DOI: 10.1136/bcr.10.2009.2398
    The use of 0.5 mg/0.05 ml of ranibizumab intracamerally, to induce regression of iris neovascularisation in a non-diabetic patient, is reported. A 55-year-old Malay man presented with left eye rubeosis and hyphaema secondary to ischaemic remnant retinal flap in his silicone filled pseudophakic eye. Regression of rubeosis and resolution of hyphaema was noted within 4 days of injection of intracameral ranibizumab, allowing repeat vitrectomy to be performed without much bleeding, thus facilitating removal of his intraocular lens and laser to remaining flap. One month postoperatively he remained comfortable with counting fingers vision similar to the pre-hyphaema period.
    Matched MeSH terms: Iris
  18. Peyman M, Ong MJ, Iqbal T, Subrayan V
    BMJ Case Rep, 2010;2010.
    PMID: 22802477 DOI: 10.1136/bcr.08.2010.3266
    Iris mammillations are dark brown, smooth, mound- or dome-shaped protuberances that are typically found on the anterior iris surface and are presumed to be congenital in origin. This congenital anomaly is usually unilateral and can be hereditary or sporadic. Lisch nodules in neurofibromatosis, tapioca melanoma of the iris, inflammatory iris granulomata and Cogan-Reese syndrome should be considered in the differential diagnosis. In this case report, the authors present a case of a bilateral iris mammillations in two siblings with congenital adrenal hyperplasia (CAH). To our knowledge, this is the first case where bilateral iris mammilations have been found to be associated with a systemic condition. Iris mammillations can be considered as one of the clinical signs in CAH in view of the pathogenesis discussed. Detailed ocular examination in CAH may reveal an increased incidence.
    Matched MeSH terms: Iris/abnormalities*
  19. Chan PS, Ting GSS, Krishnalingam MV, Ng DC
    BMJ Case Rep, 2024 Jan 24;17(1).
    PMID: 38272509 DOI: 10.1136/bcr-2023-258702
    Matched MeSH terms: Iris*; Iris Diseases*
  20. Premsenthil M, Salowi MA, Siew CM, ak Gudom I, Kah T
    BMC Ophthalmol, 2012;12:64.
    PMID: 23241197 DOI: 10.1186/1471-2415-12-64
    To report a case of spontaneous malignant glaucoma in an Asian female. To propose the term "positive vitreous pressure glaucoma" to reflect the pathophysiology, treatment and prognosis of the condition.
    Matched MeSH terms: Iris/surgery
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