Purchase this article with an account.
Miguel Castilla, Marc de Smet; The effect of posterior vitreous detachment or vitreous opacities (floaters) on straylight measurements. Invest. Ophthalmol. Vis. Sci. 2013;54(15):568.
Download citation file:
© ARVO (1962-2015); The Authors (2016-present)
To evaluate if straylight measures taken in patients with complaints of floaters (and no posterior vitreous detachment [PVD]) are different from patients presenting with a PVD.
A retrospective review of patients having undergone a straylight measurement with a C-Quant (Oculus, Germany) who presented with a complaint of floaters or observed to have a PVD when examined but who did not complain of floaters. Data was collected on age, status of the lens, and only the initial C-Quant measurement was analyzed if several were taken. Only patients with intact vitreous were considered in the study. Straylight measurements were considered significant if they were above 2 standard deviations [SD] from a normative database, controlled for age.
The mean age for both groups was 58.58 years with an SD of 12.75 years. Thrity one eyes from 29 patients were included, 11 eyes with a diagnosis of PVD, and 20 eyes with floaters. In the PVD group, only 5 eyes had measures above the 2 SD cutoff, while 14 of 20 eyes in the floaters group met this criterion. The mean straylight value for the floaters group was 1.88 with an SD of 1.42 and for the PVD group of 1.24 with an SD of 0.25. The differences between both groups did not reach statistical significance (p=0.087).
A significant difference in the number of patients with high scattered light measurements were observed in the patients with floaters and no PVD. The exact nature of this difference needs to be further evaluated. It is possible that only floaters close to the retinal surface are able to induce a measureable light scattering and be responsible for the clinical manifestations.
This PDF is available to Subscribers Only