( P- V EP, ER G K8,A g- A gc1. V EP s. : oh z 30H z; : 0. 24, 0. 48, 0. 96, 1. 85, %

Transcript

1 79 (P- V EP) P- V EP N 1 P 1 ; m s P- V EP M V T - g 16 ( P- V EP ER G ) : [ 1 ] : [ 2 V EP ] P- V EP 5K8 A g- A gc1 P - V EP s 3. : : ; : 1. 6H z; : ; : 16 95% ; : oh z 30H z; : m s; : 40 ; : 80cm ; 33 P- : 0. 4L x; (cgd) : V EP s % ; 33 ( ) : : 1.

2 80 95% [ 3 ] ( 1) N 1 - P 1 N 1 P ( 2) (AM P ) - 15Λv - 55Λv 15Λv 1 P- V EP s N 1 (m s) P 1 (M S) AM P (ΛV ) 95% 95% 95% N 1- P 1 ( 5ΛV ) ( P < ) % % ( P < ) % % % % % % 4m s 60% 51% 10m s N 1 P 1 ( P < ) ( P < 15Λv 15% ; 01001) ; 15Λv N 1 ( P > 0. 05) 64% P 1 ( P < 0. 01) ( 1) N 1 4m s 80% 92% m s 52% ; P 1 4m s ( 3) 76% 16m s 52% 3 ( P < ) 15Λv 24% ( P > 0. 05) 15Λv N 1 P 1 ( P < ) ( 1) N 1 4m s 82% 60% 10m s ; P 1 ( 0. 5Λv) (% ) % ( 91. 3% )

3 81 [ 8 76% 018 ] ( 4) N 1 P 1 4 ( 0. 1Λv) (% ) P- V EP N 1 P 1 N 1 P 1 N oo rden Ikeda [ 4 5 ] P m s P - V EP [ 6 ] 1. 0 : N 1 1. [ 8 ] P 1 N 1- P Celesia GG Bodis - wo llner I Chatrian GE et al. Recom 2 m ended standards fo r electro retiongram s and visual evoked po tentials. Repo rt of on IFCM Comm ittee. Electroen2 cephalography and C lonicaln europhysio logy : 421-

4 : V on N oo rden GK. H isto logical studies of the visual system in monkeys w ith experim ental am blyop ia : 727. Invest O hp thalmo l 5. Ikeda H W righ tm J P roperties of L GN cells in k ittens reared w ith vonvergent squinṫ a neurophysio logical demonstration of am blyop ia. Exp B rain Res : : : : 42. ( : : ) % < : ; : 1 3 : 2% 11 : 0175% : : : 012m l (1) : (2) : ( : ) % :

5 139 ABSTRACTS OF OR IGINAL ART ICL ES The managem en t of dislocated crystalline len s and v itreoretina l surgery using perf luorocarbon l iquid. Che S ong Z hao B ing shu i Guo R ong z hen et al. T ianj in Ey e H osp ital T ianj in Objective To evaluate the clinical value of perflu2 o rocarbon liqu id (PFCL ) app lication in dislocated crys2 talline lens and vitreo retinal (V R ) surgery. M ethods intro trop ic am blyop ia patienṫ A nd the distribution of W e u sed PFCL to treat tw e cases of dislocated crys2 talline len s and u sed PFCL to treat th irty- seven cases of com p licated retinal detachm en ts and tw o cases of traum atic retinal detachm ent and one case of p ro lifera2 tive diabetic retinopathy in V R surgery. Results W e contro l o r the fellow eyes of am blyop ia patient w ere compared each o theṙ Results T he average of these th ree impo rtant param eters of the tw o k inds of am bly2 op ias all change significantly. T here are significant de2 lays of the latencies of N 1 P1 w hen am b lyop ia eye is compared w ith either no rm al contro l o r the fellow eye of the am p litudes is sim ilaṙ T h is show s that the fellow eyes of intro trop ic am blyop ia patients are no t no rm al eyes O ur results also p rovide an index fo r am blyop ia di2 agno sis if the amp litude of anisom etrop ic am blyop ia is low er less than 0. 8 and the latency is longer mo re than u sed PFCL to facilitate the safe rem oval of tw o hard dislocated crystalline len s and their vision im p roved. T he V R surgery w as effective in 35 eyes (87. 5% ) on discharge from the ho sp ital. T he fo llow ed up period is mo re than 3 month s in 27 cases averaging fo llow ed- up fo r 6. 5 month s to find the op reative results stable in 25 cases (92. 6% ) and the final visual acu ity ranged from to 0. 5 in 48% of the patients that attained retinal reattachm enṫ Conclusion PFCL is a safe and valuable in treatm ent of dislocated crystalline lens and is helpful to V R su rgery in the im p rove the success rate of the retinal detachm ent and the visual acuity outcom eṡ Key words Perfluo rocarbon liquids D islocated crystalline lens R etinal detachm ent V itreo retinal su rgery (O riginal article on page 75) 5m s by comparing w ith the fellow eye. Conclusion It s feasable fo r am blyop ia diagno sis based on the P - V EP m ethod. Key words A nisom etrop ia Intro trop ia Am bly2 op ia P- V EP (O riginal article on page 79) A study on objective evaluation of v isual acuity M ei J un Y i L ianf ang Y u Chang tai et al. D ep art2 m ent of Op h thalm ology lst A f f iliated H osp ital H ubei M ed ical U niversity W uhan Objective To study the feasibility of objective e2 valuation of visual acu ity (VA ) by pattern visual evoked po tential (PV EP). M ethods Fourty eyes w ith different VA and fifty eyes as no rm al contro ls w ere tested by PV EP at 7 check sizes ( ). Results T here w as significant difference betw een patients Investiga tion of m ulti- channel pa ttern reversa l v i- sual evoked poten tials of an isom etrop ic am blyop ia and in trotrop ic am blyop ia Chen L iny i H u B ing Y in L u et al. Center f or Ch ild ren s am bly op ia and S trabism us U S T C H ef ei Objectives To further investigate the m echanism of amp lyop ia and the relationsh ip betw een tw o k inds of am blyop iaṡ M ethod P - V EP reco rding 14- channel signal analysis 25 cases of anisom etrop ic am blyop ia and 33 cases of intro trop ic am blyop ia w ere checkedb using group and no rm al group in am p litude and latency of P100. T he relation sh ip betw een VA and the sm allest check size that p roduced a definite PV EP w as obvious: the sm allest check size w ere and 1 and the m ean VA w ere and respectively. Po sitive co rrelation w as found betw een VA and P 100 am 2 p litude and negative co rrelation w as found betw een VA and P 100 latency. Conclusion T he objcctivc VA can be estim ated by the sm allest check size w h ich p roduced PV EP. Key words V isual evoked po tential P 100 V isual T he th ree impo rtant param eters of either the no rm al acuity Check size