The retinal structure and visual acuity in Japanese flounder Paralichthys olivaceus at different stages of development were examined by light microscopy. The resolving power of the retina, the visual axis and the best...The retinal structure and visual acuity in Japanese flounder Paralichthys olivaceus at different stages of development were examined by light microscopy. The resolving power of the retina, the visual axis and the best visual field were estimated based on the distribution of cone cells in the retina. The visual system of the larvae appears poorly developed at hatching. The larvae with total length (TL) of less than 10 mm, have single cones only and the eyes were well pigmented. At 10-11 mm TL, most single cones fused to form double cones, with the single and double cones forming a mosaic pattern. From larvae to early juvenile the retina stretches, the cones increase in diameter and rods increase in number. Based on the highest density of the cones in the ventro temporal region, the visual axis was orientated up forward. The resolving power of the retina in 40-530 mm TL Japanese flounder was found to range from 25.1 to 11.5 min. The results indicated continual improvements in the visual system of the growing fish towards higher resolving power, visual acuity and sensitivity.展开更多
A 52 year-old construction worker presented with progressive painful blurring of vision in the left eye associated with redness for past 1 month.There was a history of penetrating injury in the same eye 10 years ago a...A 52 year-old construction worker presented with progressive painful blurring of vision in the left eye associated with redness for past 1 month.There was a history of penetrating injury in the same eye 10 years ago and he underwent primary wound toilet and suturing,lens removal with intraocular lens implantation.Slit lamp examination revealed a corneal scar at 9’oclock,a large transilluminant iris cyst superotemporally and adherent to corneal endothelium.It was extended from angle of the pupil and obstructing the visual axis.The patient underwent excision of an iris cyst through superior limbal incision.Viscodissection was done to separate the cyst from the corneal endothelium and underlying iris stroma.Trypan blue ophthalmic solution was injected into the cyst to stain the cyst capsule.Post operatively 7 days,vision improved to 6/7.5 without complication.There was no recurrence up to 1 year postoperation.Histopathological finding revealed a benign cyst mass lined by simple cuboidal to nonkeratinized stratified squamous epithelium.We had achieved a good surgical outcome with no complication to date for our case study.We advocate this modified surgical method to completely remove iris cyst.展开更多
基金Project 39970578 supported by the NSFCsupported by the Ministry of Education Foundation for University Key Teachers.
文摘The retinal structure and visual acuity in Japanese flounder Paralichthys olivaceus at different stages of development were examined by light microscopy. The resolving power of the retina, the visual axis and the best visual field were estimated based on the distribution of cone cells in the retina. The visual system of the larvae appears poorly developed at hatching. The larvae with total length (TL) of less than 10 mm, have single cones only and the eyes were well pigmented. At 10-11 mm TL, most single cones fused to form double cones, with the single and double cones forming a mosaic pattern. From larvae to early juvenile the retina stretches, the cones increase in diameter and rods increase in number. Based on the highest density of the cones in the ventro temporal region, the visual axis was orientated up forward. The resolving power of the retina in 40-530 mm TL Japanese flounder was found to range from 25.1 to 11.5 min. The results indicated continual improvements in the visual system of the growing fish towards higher resolving power, visual acuity and sensitivity.
文摘A 52 year-old construction worker presented with progressive painful blurring of vision in the left eye associated with redness for past 1 month.There was a history of penetrating injury in the same eye 10 years ago and he underwent primary wound toilet and suturing,lens removal with intraocular lens implantation.Slit lamp examination revealed a corneal scar at 9’oclock,a large transilluminant iris cyst superotemporally and adherent to corneal endothelium.It was extended from angle of the pupil and obstructing the visual axis.The patient underwent excision of an iris cyst through superior limbal incision.Viscodissection was done to separate the cyst from the corneal endothelium and underlying iris stroma.Trypan blue ophthalmic solution was injected into the cyst to stain the cyst capsule.Post operatively 7 days,vision improved to 6/7.5 without complication.There was no recurrence up to 1 year postoperation.Histopathological finding revealed a benign cyst mass lined by simple cuboidal to nonkeratinized stratified squamous epithelium.We had achieved a good surgical outcome with no complication to date for our case study.We advocate this modified surgical method to completely remove iris cyst.
