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Macular pigment and dark adaptation in older population with normal maculas
Macular pigment (MP) such as lutein, zeaxanthin and meso-zeaxanthin are highly concentrated in the fovea. They protect the retina from damage of ambient blue light via antioxidant properties. In older eyes with normal healthy retina, macular pigment optical density (MPOD)...
Effects of blood donation on the physiology of the eye
Hypovolaemia is a state of decreased blood volume, the reduction of which reduces tissue perfusion which may in turn lead to cellular hypoxia and end-organ damage. In blood donation, 500ml of blood is collected in ten minutes. This equates to...
Lens surgery in patients with lens subluxation misdiagnosed as primary angle-closure glaucoma
Lens subluxation can be caused by many conditions including Marfan syndrome and other hereditary conditions, and blunt trauma. Lens displacement can cause pupillary block and angle closure. This is commonly misdiagnosed as primary angle closure glaucoma (PACG), which can lead...
Nishida procedure for VIcnp
This study reports results in treatment of complete sixth nerve palsy (VIcnp) by modified Hummelscheim (Nishida’s) procedure; vertical muscle halves after splitting were secured with anchoring sutures to the sclera with anchoring of only the temporal muscle margins to the...
Laser pointer maculopathy
The objective of this study was to describe the potential clinical presentations of retinal pathology resulting from exposure to laser pointers. The study included eight eyes of seven patients. Mean age was 18.7 years (12-36). Most were accidental self-inflicted while...
Link between compression of anterior visual pathway structures and visual deficit
The compression of anterior visual pathway (AVP) structures can be observed on neuroimaging. It is not clear whether or not this compression results in damage to these structures. The authors present a single centre retrospective case record review over the...
A novel way to diagnose optic neuropathies using Bruch’s membrane opening
Differential diagnosis of optic neuropathies can be challenging but is crucial for the correct management of the underlying disease and prevention of further damage. Bruch’s membrane opening (BMO) was recently discovered as the anatomical border of the optic disc. BMO...
Occult central retinal artery occlusion
Central retinal artery occlusion (CRAO) is a sight-threatening condition resulting from occlusion of the central retinal artery and hypoperfusion of the inner retina. Early on, fundal examination may be normal. The authors present a retrospective case series of 11 patients...
Risk factors for visual impairment in facial nerve palsy
Facial nerve palsy (FNP) is known to be associated with corneal exposure due to the nature of the condition, but how many of those will go on to develop severe visual impairment (SVI)? This study investigates the risk factors associated...
Macular pigment in relatives of AMD patients
Blue light causes photo-oxidative retinal injury and macular pigment (MP), with lutein, zeaxanthin and mesozeaxanthin as the main components, as a filter that protects the macula from this damage. Previous studies indicated that low levels of macular pigment optical density...
A modified technique for external DCR
The authors described a modified technique for external dacryocystorhinostomy (DCR) whereby the lacrimal sac is excised medially along its length using a 15mm blade. Following insertion of silicone stents, the remaining part of the anterior wall of the lacrimal sac...
