Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 20 for “"Scleral"”.
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The Impact of a Scleral Lens on the Eye
… gaps in understanding ocular effects of a scleral lens (SL), particularly in the composition of the fluid reservoir (FR) that bathes the cornea and the impact of the landing zone radius (LZR) on the eye. The purpose of this dissertation is to (1) identify and compare molecules in the FR to …
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Torsional calibration of scleral coil measurements of the human eye
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1991.
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IN-VIVO SCLERAL AND CORNEAL BIOMECHANICS AS BIOMARKERS IN OPHTHALMIC PRACTICE
As the relationship between biomechanical properties and abnormal tissue mechanics become more and more apparent in the field of ophthalmology, demand for in-vivo determination of biomechanical properties have also increased. While devices like the Ocular Response Analyser (ORA) have made the …
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Adding Personalized Wavefront Correction to a Scleral Lens After Lens Manufacture
PURPOSE: To date, wavefront-guided scleral lenses have relied on the full-surface method (FSM) of manufacture, which requires the wavefront correction to be integrated into the design of a traditional scleral lens prior to lens manufacture. A novel patch-cutting method (PCM) of manufacture would …
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Measurements of ocular counterrolling during linear accelerations using an electromagnetic scleral search coil system
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1991.
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Audit of cataract surgery at Groote Schuur Hospital
… phacoemlusifaction group and in 65.77% of the scleral tunnel extracapsular cataract extraction group. (p=0.103). Secondary outcomes: Intraoperative complications were noted in 7.34% in the phacoemulsification group and in 12.87% of the scleral tunnel extracapsular cataract extraction group. …
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Continuous Monitoring of Intraocular Pressure from the Sclera
… are to provide proof-of-principle for a novel, scleral mounted device for measuring IOP by: (1) establishing whether IOP can be recorded from the conjunctival and scleral surface using enucleated porcine eyes; (2) establishing whether IOP can be recorded from the conjunctival surface in a live …
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Part I: Effect of Nanomicelle Size on Trans-scleral Permeability of Dexamethasone and Part II: Strategies to Minimize Octreotide Acylation during Sustained Release from Biodegradable Polymers
Our primary aim was to determine the effect of nanomicelle size on dexamethasone (DEX) transport across the sclera. Nanomicelles of various sizes were developed and characterized. Low molecular weight diblock co-polymers, mPEG₇₅₀-PCL₇₀₀ (DB1), mPEG₂₀₀₀-PCL₁₅₀₀ (DB2) and mPEG₅₀₀₀-PCL₄₀₀₀ (DB3) were …
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Topical Clear Aqueous Nanomicellar Formulations For Anterior And Posterior Ocular Drug Delivery
… therapy (glaucoma and cataract), since a trans-scleral route of absorption is accessed. In summary, for the first time we identified that resolvin analog was substrate/inhibitor for BCRP and MRP but not P-gp. Moreover, resolvin analog was identified as a strong inhibitor of influx transporter …
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A Lorentz-force actuated needle-free intraocular injection device
… with an injection duration less than 100 ms and scleral entry site less than 350 [mu]m in diameter. A relationship has been developed between injection parameters and eye damage metrics that can be used for future parameter optimization, minimizing damage to the eye.
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Ultrahigh-resolution, deep-penetration spectral-domain optical coherence tomography
… In addition, we show images of the corneo-scleral angle, which could help properly diagnose primary angle-closure glaucoma. Other potential applications are also discussed.
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Das Krankheitsbild und die Behandlungsalternativen der Unterlidretraktion bei Patienten mit Morbus Basedow nach transpalpebraler Orbitadekompression : Gegenüberstellung der Ergebnisse nach Konchaknorpel- und PDS-Folienimplantation in Hinsicht auf Funktionalität und Ästhetik
… Margin-Reflex-Distance-2 (MRD-2) as well as of scleral-show values was evident with both materials. However, the assessment of mean difference in MRD-2 and scleral-show values in this study showed that the postoperative results in cases with PDS-foil implantation were far better than those in …
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Development and Characterization of Fluocinolone Acetonide Loaded Nanosized Lipid Carriers for Ocular Delivery via Subconjunctival Route: Synergistic Effect of Vitamin a Palmitate
… and permeability studies using corneal and scleral tissues. Furthermore, the ocular pharmacokinetic studies of in situ gel were conducted in New Zealand albino rabbits after subconjunctival injection, and compared with control formulation. Differential scanning calorimetry and …
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Design of a Precision Needle for Injection of Fluid into the Suprachoroidal Space of the Eye for the Treatment of Retinal Detachment
… between locations on the eye. Additionally, the scleral and choroidal tissues are very thin, leaving little room for positional error. Hemorrhage may occur if the needle punctures through the choroid and into the subretinal space, which could lead to bad outcomes. This work presents a device …
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AMNIOTIC MEMBRANE TRANSPLANTATION FOR OCULAR SURFACE RECONSTRUCTION IN VETERINARY MEDICINE
… Stevens Johnson syndrome, melting ulcers, scleral melt and band keratopathy. In veterinary ophthalmology AMT has been described for the treatment of ocular surface neoplasia, bullous keratopaty, melting ulcers, symblepharon, immun-mediated keratitis and in conjunction with penetrating …
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Segmentation and Feature Extraction Methods for Ocular Modalities
… In this dissertation, we design and evaluate the scleral segmentation algorithms, vascular pattern enhancement techniques, feature extraction methodologies and feature enhancement methods for CV recognition. We introduce a new sclera segmentation algorithm using morphological properties of human …
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Development of Multielectrode Electroretinography (meERG) for Human Clinical Use
… inter-subject variability in corneal and scleral topography. Light transmission (for the ERG stimulus) was enhanced by optimizing electrode cable design, improving nasal–temporal trace symmetry for more uniform retinal illumination, and implementing transparent electrode cables (BioCLEAR), …
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On Complications to Cataract Surgery
… 0.05%. Repositioning of the dislocated IOL with scleral sutures and a high frequency of pars plana vitrectomy procedures resulted in few complications and 59% of the patients obtained a visual acuity of ≥0.5. In patients with IOL dislocation and glaucoma, improved intraocular pressure (IOP) …
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Structural Studies of the Corneal Stroma
… is calculated and compared with that from scleral collagen which shows the first order reflections. Finally, the transmission of light by the stroma is shown to decrease linearly with increasing hydration, the rate of decrease being dependent on the pH of the bathing solution. Correlations …
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Βιοαποικοδομήσιμο σύστημα ελεγχόμενης αποδέσμευσης ακετονικής τριαμσινολόνης για διασκληρική χορήγηση : in vitro μελέτη
Η Ακετονική Τριαμσινολόνη είναι ένα συνθετικό γλυκοκορτικοειδές το οποίο έχει ευρέως χρησιμοποιηθεί στη θεραπεία ενός αριθμού φλεγμονωδών και αγγειακών / εξιδρωματικών παθήσεων του οφθαλμού, χορηγούμενη υπό μορφή ένεσης παραβόλβια, υποτενόνια ή ενδοϋαλοειδικά. Δυστυχώς έχει περιορισμένο χρόνο …