Tags

Type your tag names separated by a space and hit enter

Rabbit eye exposure to broad-spectrum fluorescent light.
Acta Ophthalmol Suppl. 1983; 159:1-54.AO

Abstract

Two F40CW fluorescent lamps mounted in an EYS-2404 fixture and 300 nm, 5 nm waveband UV radiation were used to expose pigmented rabbit eyes. The results of the exposures to the eye were evaluated with the biomicroscope, ophthalmoscope, light microscope and electron microscope. The following conclusions were reached: The adverse ocular responses to fluorescent radiation exposure were due to long-duration, broadband radiation. These reactions were more generalized for fluorescent exposures when the cornea and lens are compared to UV exposures. The differences between the levels of threshold exposure needed to cause damage for the fluorescent source and UV radiation were attributed to exposure duration and the rate of delivery of the radiation. Corneal and lenticular damage was mild when compared with UV 300 nm exposures, and the threshold occurred after 8 h to 12 h of exposure. The effect of the radiation was to interfere with the normal functions of the cell while changes to the inert materials in the tissues was secondary to injury to the cell. The damage was mild in the corneal epithelium, somewhat more severe in the corneal endothelium, but minimal in the corneal stroma. Early retinal changes were found after 8 h of exposure to the fluorescent source. These induced changes were evident in the neural retina as spaces and were assumed to represent oedema. The retinal oedema was initially found only in the receptor cell, outer nuclear and nerve fibre layers. Many vacuoles or spaces were located in the junctional area between the ganglion cell and nerve fibre layers while smaller spacing occurred also within the nerve fibre layer. Twelve h of exposure to the fluorescent source produced a further increase in the oedema in the retina. The outer segments of the receptor cells appear to disintegrate and significant open spaces are evident among the inner and outer segments of the receptors. The inner plexiform layer shows an increased number of spaces within and among the neural elements, and the mitochondria appeared to be undergoing changes. The 20-h and longer exposure induced severe changes affecting all layers of the retina. These changes include massive retinal oedema with degenerative signs in all retinal neurons. A sympathetic reaction of the unexposed, contralateral eye occurred as the result of the damage to the exposed eye. Minimal sympathetic responses to the cornea and the lens began at exposure durations at or above 12 h, while the retina showed the sympathetic reaction beginning at 8 h.(

ABSTRACT

TRUNCATED AT 400 WORDS)

Authors

No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

6318510

Citation

Pitts, D G., et al. "Rabbit Eye Exposure to Broad-spectrum Fluorescent Light." Acta Ophthalmologica. Supplementum, vol. 159, 1983, pp. 1-54.
Pitts DG, Bergmanson JP, Chu LW. Rabbit eye exposure to broad-spectrum fluorescent light. Acta Ophthalmol Suppl. 1983;159:1-54.
Pitts, D. G., Bergmanson, J. P., & Chu, L. W. (1983). Rabbit eye exposure to broad-spectrum fluorescent light. Acta Ophthalmologica. Supplementum, 159, 1-54.
Pitts DG, Bergmanson JP, Chu LW. Rabbit Eye Exposure to Broad-spectrum Fluorescent Light. Acta Ophthalmol Suppl. 1983;159:1-54. PubMed PMID: 6318510.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Rabbit eye exposure to broad-spectrum fluorescent light. AU - Pitts,D G, AU - Bergmanson,J P, AU - Chu,L W, PY - 1983/1/1/pubmed PY - 1983/1/1/medline PY - 1983/1/1/entrez SP - 1 EP - 54 JF - Acta ophthalmologica. Supplementum JO - Acta Ophthalmol. Suppl. VL - 159 N2 - Two F40CW fluorescent lamps mounted in an EYS-2404 fixture and 300 nm, 5 nm waveband UV radiation were used to expose pigmented rabbit eyes. The results of the exposures to the eye were evaluated with the biomicroscope, ophthalmoscope, light microscope and electron microscope. The following conclusions were reached: The adverse ocular responses to fluorescent radiation exposure were due to long-duration, broadband radiation. These reactions were more generalized for fluorescent exposures when the cornea and lens are compared to UV exposures. The differences between the levels of threshold exposure needed to cause damage for the fluorescent source and UV radiation were attributed to exposure duration and the rate of delivery of the radiation. Corneal and lenticular damage was mild when compared with UV 300 nm exposures, and the threshold occurred after 8 h to 12 h of exposure. The effect of the radiation was to interfere with the normal functions of the cell while changes to the inert materials in the tissues was secondary to injury to the cell. The damage was mild in the corneal epithelium, somewhat more severe in the corneal endothelium, but minimal in the corneal stroma. Early retinal changes were found after 8 h of exposure to the fluorescent source. These induced changes were evident in the neural retina as spaces and were assumed to represent oedema. The retinal oedema was initially found only in the receptor cell, outer nuclear and nerve fibre layers. Many vacuoles or spaces were located in the junctional area between the ganglion cell and nerve fibre layers while smaller spacing occurred also within the nerve fibre layer. Twelve h of exposure to the fluorescent source produced a further increase in the oedema in the retina. The outer segments of the receptor cells appear to disintegrate and significant open spaces are evident among the inner and outer segments of the receptors. The inner plexiform layer shows an increased number of spaces within and among the neural elements, and the mitochondria appeared to be undergoing changes. The 20-h and longer exposure induced severe changes affecting all layers of the retina. These changes include massive retinal oedema with degenerative signs in all retinal neurons. A sympathetic reaction of the unexposed, contralateral eye occurred as the result of the damage to the exposed eye. Minimal sympathetic responses to the cornea and the lens began at exposure durations at or above 12 h, while the retina showed the sympathetic reaction beginning at 8 h.(ABSTRACT TRUNCATED AT 400 WORDS) SN - 0065-1451 UR - https://www.unboundmedicine.com/medline/citation/6318510/Rabbit_eye_exposure_to_broad_spectrum_fluorescent_light_ L2 - https://medlineplus.gov/eyecare.html DB - PRIME DP - Unbound Medicine ER -