Analysis of intraocular straylight, especially in relation to age

Optom Vis Sci. 1995 Feb;72(2):52-9. doi: 10.1097/00006324-199502000-00003.


Purpose: To analyze straylight resulting from different sources (cornea, lens, wall translucency, and fundus reflectance) in combination with different properties (age and pigmentation). To give formulas for straylight calculations.

Methods: In straylight on the retina multiple scattering can be assumed to be unimportant. Consequently, an additive model can be applied.

Results: An efficient parameter to quantify straylight is the "straylight parameter" s(theta), with theta the scatter angle. The model reads s(theta) = s(cornea)(theta) + s(lens)(theta) + s(wall)(theta) + sfundus(theta), and each of these sources is analyzed as sx(theta) = sx,base(theta) + a(age)*sx,age(theta) + p(pigm.)*sx,pigm.(theta).

Conclusions: The most important effects, viz., s(lens,age), s(wall + fundus,pigm.) and s(cornea + lens + fundus,base) as well as a(age) and p(pigm.) were estimated. With the straylight parameter different effects of straylight, notably its disabling effect of contrast reduction, follow directly.

MeSH terms

  • Adult
  • Aged
  • Aged, 80 and over
  • Aging / physiology*
  • Contrast Sensitivity / physiology
  • Cornea / physiology
  • Eye Color
  • Fundus Oculi
  • Humans
  • Lens, Crystalline / physiology
  • Light
  • Middle Aged
  • Scattering, Radiation*
  • Vision Disorders / physiopathology
  • Vision, Ocular / physiology*