logMAR: logarithm of minimal angle of resolution; PHQ-9: Patient Health Questionnaire-9; PSS: Perceived Stress Scale; PVD: posterior vitreous detachment
; SEQ: spherical equivalent; STAI: State-Trait Anxiety Inventory.
In idiopathic ERMs, it is probable that the development of a spontaneous posterior vitreous detachment
(PVD) causes micro-trauma at the retinal surface particularly at points that generally have a stronger vitreoretinal adhesion such as the vitreofoveal interface and optic disc; this allows Muller cells to migrate through the microscopic breaks onto the retinal surface and contribute to the development of an ERM.
(7) The MH either may form when posterior vitreous detachment
(PVD) occurs or may be due to the dehiscence of chronic cystoid macular edema in a long-standing RRD.
Mechanisms responsible for retinal break formation in closed globe injury may be as follows: vitreous base avulsion, abnormal sites of vitreoretinal adhesion (e.g., lattice degeneration), coup injury, contrecoup injury at a location opposite to the site of impact, or sudden posterior vitreous detachment
Table 1 shows the conditions considered to be inappropriate for urgent referral to the eye department; of these the most commonly identified condition inappropriately referred urgently was posterior vitreous detachment
(PVD) with no sign of retinal hole/tear/break and a negative Shaffer's sign.
reported that using 25-gauge vitrectomy instruments and not inducing posterior vitreous detachment
can be uniformly safe for systemic vitreous floaters, since apparently lower incidence (none) of retinal tear or infection was observed.
Figure 3 Diagnosis following presenting complaint of flashers and floaters Uncomplicated posterior vitreous detachment
57% Retinal tear/hole 7% Vitreous haemorrage 9% Migraine 3% No abnormality detected 7% Other 17% Note: Table made from bar graph.
A second analogous retrospective chart review was also performed to establish a control group consisting of patients presenting with an uneventful, "normal," unilateral posterior vitreous detachment
(PVD) and an attached vitreous in the contralateral eye.
Additionally, posterior vitreous detachment
(PVD) can act as a protecting factor in cases with endogenous endophthalmitis.
The prevalence of posterior vitreous detachment
(PVD) increases with age, as the vitreous liquefies.
Posterior vitreous detachment
(PVD) was induced very carefully by the cutter probe using aspiration.
Such haemorrhages have a crescent shape which demarcates the limit of the posterior vitreous detachment
. The aetiology is commonly neovascularisation or complicated posterior vitreous detachment