Title: MIODESOPSIE
1MIODESOPSIE
- LO STATO DELLARTE
- E
- LE PROSPETTIVE DI RICERCA
2I POSSIBILI TRATTAMENTI
- VITREOCTOMIA
2. VITREOLISI LASER
3. VITREOLISI ENZIMATICA
4. RIMEDI ALTERNATIVI
3VITREOCTOMIA
4PARSA PLANA VITREOCTOMIA
- Retina. 200020(6)591-6.Related Articles, Links
- Pars plana vitrectomy for persistent, visually
significant vitreous opacities.Schiff WM, Chang
S, Mandava N, Barile GR.Department of
Ophthalmology, Columbia University College of
Physicians and Surgeons, Edward S. Harkness Eye
Institute, and St. Luke's-Roosevelt Hospital
Center, New York, New York, USA.PURPOSE To
evaluate the role of vitrectomy in patients with
persistent, visually disabling vitreous
opacities. METHODS Six consecutive eyes of five
men (age 58-66 years) with pseudophakia or
aphakia and vitreous opacities resulting in
visual symptoms for more than 1 year that
underwent vitrectomy were retrospectively
reviewed. Postoperative questionnaires regarding
functional performance and quality-of-life issues
were completed by the participants to assess
subjective patient satisfaction. RESULTS
Postoperative Snellen visual acuity was improved
or equal to preoperative acuity in all cases
(8-44 month follow-up) and there were no surgical
complications. All patients expressed high
satisfaction with overall visual function.
Analysis of the National Eye Institute Visual
Function Questionnaire-39 indicated that general
vision, near activities, distance activities,
mental health, role difficulties, and peripheral
vision were significantly improved (P lt 0.05)
following surgical intervention. CONCLUSIONS
Vitrectomy may be indicated in a select group of
patients with visually disabling vitreous
floaters, although objective assessment of visual
dysfunction from vitreous floaters requires
further evaluation.Publication Types - Case Reports
- PMID 11131410 PubMed - indexed for MEDLINE
5PARSA PLANA VITREOCTOMIA
- Ophthalmologe. 2003 Aug100(8)639-43. Epub 2003
Jun 18.Related Articles, Links - Vitreous body floaters and vitrectomy with
full visual acuityArticle in GermanHoerauf
H, Muller M, Laqua H.Klinik fur Augenheilkunde,
Universitatsklinikum Lubeck. hhoerauf_at_ophtha.mu-lu
ebeck.dePURPOSE To evaluate the role of
vitrectomy in patients with visually disturbing
vitreous body floaters and full visual acuity
(VA). METHODS A total of 9 eyes from 8 patients
(2 female, 7 male, median age 57 years) with a
preoperative VA of 1.0 were analysed
retrospectively. The median duration of symptoms
was 12 months. In all eyes a pars plana
vitrectomy was performed. The median follow-up
period was 13 months. RESULTS No intraoperative
or postoperative complications were observed. In
all patients vision improved subjectively and
objective VA remained unchanged. In 2 out of 5
phacic patients a cataract extraction was
performed during the follow-up period.
CONCLUSIONS In a selected group of patients
vitrectomy can improve subjective vision even in
eyes with full objective VA. A critical patient
selection with respect to psychological criteria
and the individual risk of vitrectomy is
extremely important.PMID 12955446 PubMed -
indexed for MEDLINE
6PARSA PLANA VITREOCTOMIA
- J Fr Ophtalmol. 2004 May27(5)491-5.Related
Articles, Links - Vitrectomy for floatersArticle in
FrenchQuintyn JC, Brasseur G.Service
d'Ophtalmologie, CHU de Rangueil, Toulouse.
qjc76_at_hotmail.comPURPOSE To clarify vitrectomy
indications in the treatment of vitreous
floaters. METHODS This is a retrospective study
of four patients, four eyes (age, 42-65 years),
who underwent vitrectomy for the treatment of
vitreous floaters. Two patients had a total
posterior vitreous detachment. All patients were
required to think about the intervention for
several months before consenting. RESULTS
Preoperative visual acuity ranged from 20/40 to
30/30 and after the operation it ranged from
20/40 to 10/10. Minimum follow-up was 1 year.
Visual acuity did not decrease after treatment in
any patients. All patients expressed satisfaction
with their postoperative visual function.
DISCUSSION-CONCLUSION Visual acuity measures do
not always accurately reflect patients' visual
discomfort. Vitrectomy has been known for many
years. It can be proposed as a last resort after
thorough retina examination, after patients have
received adequate information and they are
psychologically ready for the procedure.PMID
15179305 PubMed - indexed for MEDLINE
7PARSA PLANA VITREOCTOMIA
- Klin Monatsbl Augenheilkd. 2005
Sep222(9)728-32.Related Articles, Links - Pars plana vitrectomy for vitreous
floaters.Article in GermanRoth M,
Trittibach P, Koerner F, Sarra G.Klinik und
Poliklinik fur Augenheilkunde, Inselspital,
Universitatsspital Bern, Schweiz.BACKGROUND
The aim of this study was to evaluate the role of
pars plana vitrectomy (PPV) in patients with
persistent vitreous floaters (VF) in phakic (56.7
) or pseudophakic (43.3 ) eyes. SUBJECTS AND
METHODS A retrospective study of 24 consecutive
patients (30 eyes) who underwent a 2-port-PPV
using indirect opthalmoscopy between 1992 and
2003 was carried out. Main outcome measures were
postoperative visual acuity (PVA), incidence of
postoperative complications and patient
satisfaction, which has been assessed
retrospectively using a detailed questionnaire
RESULTS Symptoms resolved in all patients. PVA
was significantly better (0.91 /- 0.2 vs. 0.84
/- 0.2 preoperative visual acuity) or equal in
25 patients (83.3 ). One pseudophakic patient
(3.3 ) experienced a retinal detachment 48
months after surgery. In 5 of 17 phakic eyes (35
) a cataract extraction had to be performed
during the follow-up period. All patients were
satisfied with their overall visual function.
DISCUSSION This study shows PPV to be a safe and
effective primary treatment for visually
disturbing VF. In spite of the small number of
cases with a lower PVA (5 eyes/16.7 ), which in
the most severe case corresponded to a reduction
of VA from 1.0 to 0.6 due to a nuclear sclerosis
of the lens, all patients were satisfied. As
vitreoretinal complications may occur, a critical
patient selection and a careful preoperative
assessment of specific risks of vitrectomy are
mandatory.PMID 16175483 PubMed - in process
8VITREOCTOMIA SUTURELESS
9VITREOCTOMIA SUTURELESS
OSPEDALE DI LINZ-AUSTRIA
10VITREOCTOMIA SUTURELESS
- CATARATTA
- lt10 fino a 30 anni
- 50 fino a 50 anni
- 100 oltre i 65 anni
- COMPLICAZIONI POST-OPERATORIE
11PREVENZIONE CATARATTA
- J Cataract Refract Surg. 2002 Apr28(4)589-92.Rel
ated Articles, Links - Comment in
- J Cataract Refract Surg. 2003 Aug29(8)1466-7
author reply 1467. - Floaterectomy combined phacoemulsification
and deep anterior vitrectomy.Mossa F, Delaney
YM, Rosen PH, Rahman R.Department of
Ophthalmology, John Radcliffe Hospitals NHS
Trust, Oxford, United Kingdom.We describe a
1-stage surgical technique to treat vitreous
floaters. Phacoemulsification is combined with a
deep anterior vitrectomy through a posterior
curvilinear capsulorhexis followed by
implantation of a posterior chamber intraocular
lens. The technique was used in 10 eyes of 6
patients. Six months postoperatively, 8 eyes had
a best corrected visual acuity (BCVA) of 6/6 with
complete resolution of symptoms. Two eyes of 1
patient developed cystoid macular edema that
reduced final BCVA to 6/18 bilaterally. In this
case, the floaters may have been the result of
previously undiagnosed intermediate
uveitis.PMID 11955895 PubMed - indexed for
MEDLINE
FLOATERROCTOMIA
12PREVENZIONE CATARATTA
- Exp Eye Res. 2002 Oct75(4)459-73.Related
Articles, Links - Suppression of post-vitrectomy lens changes in
the rabbit by novel benzopyranyl esters and
amides.Kuszak JR, Sivak JG, Moran KL, Scheib
SA, Garner WH, Ke TL, Hellberg MR, Graff
G.Department of Ophthalmology,
Rush-Presbyterian-St. Luke's Medical Center,
Chicago, IL, USA.This study reports for the
first time a therapeutic modality for the
suppression of posterior subcapsular cataract
(PSC) formation in an animal model (rabbit) of
vitrectomy. This therapeutic modality may also
have the potential to attenuate/prevent the high
incidence of loss of vision due to cataract
formation in patients that undergo vitrectomy.
Unilateral, partial vitrectomy was performed on
2.5 month old Dutch Belted rabbits with vitreous
replaced by either commercially available
BSS((R)) or BSS PLUS((R)) (n16). Alternatively,
vitreous was replaced with a proprietary,
modified BSS PLUS((R)) irrigating solution
containing 1.25 microM AL-8417 (n12), 5.0 microM
AL-12615 (n5) or 5.0 microM AL-17052 (n9). Age
matched, non-operated rabbits were used as
controls (n16). Lenses were analysed by
correlative structural (light, scanning electron
microscopic and three-dimensional
computer-assisted drawings) and optical (low
power helium-neon laser scan) quality analysis 6
months following surgery. Results demonstrate
that vitreous replacement with an irrigating
solution that contains the ester-linked
benzopyran, AL-8417, the amide-linked benzopyran
pro-drug, AL-17052, or its active metabolite,
AL-12615, prevented abnormal post-vitrectomy lens
growth, or fiber formation. Focal length
variability (FLV) assessments (sharpness of
focus) confirmed the beneficial drug effects
detected morphologically, with FLV being
essentially equal to that of age-matched,
non-surgical controls. In contrast, lenses of
animals with vitreous replaced solely with
BSS((R)) or BSS PLUS((R)) exhibited significantly
higher FLV than both age-matched controls and
animals that underwent vitrectomy with
drug-containing irrigating solutions. The ability
of AL-8417, AL-17052 and its active metabolite,
AL-12615, to suppress vitrectomy-induced
posterior lens fiber changes appears to reside in
their unique pharmacological profile, acting as
antioxidant, anti-inflammatory and cytostatic
agents.PMID 12387793 PubMed - indexed for
MEDLINE
INIEZIONI INTRAVITREALI
13VITREOCTOMIA SUTURELESS
14VITREOCTOMIA SUTURELESS
VITREO ARTIFICIALE
15VITREOCTOMIA SUTURELESS
- distacco di retina (lt0,5)
- infiammazioni oculari (lt0,05)
- aumento della pressione oculare (30)
- COMPLICAZIONI POST-OPERATORIE
16FLOATERS ONLY VITRECTOMY
- For years, ophthalmologists had been cautious in
recommending vitrectomy surgery for patients
suffering from floaters. Now, a new study
conducted, suggests that vitrectomy may be a
practical solution for many patients. - Due to improved techniques and instrumentation,
vitrectomy, a technique used to clear blood and
debris from the vitreous, a normally clear,
gel-like substance that fills the center of the
eye, is now a viable option for patients
suffering from floaters. - A study conducted by William M. Schiff, M.D., of
the Department of Ophthalmology, Columbia
University College of Physicians and Surgeons and
his colleagues, concluded that vision was
improved in 6 out of 6 eyes with no surgical
complications following vitrectomy for the
removal of persistent, visually significant
floaters. All patients involved in the
evaluation were highly satisfied with their
visual results with a profound improvement in
overall lifestyle activities in regards to visual
acuity. - Vitrectomy is rarely needed since floaters
typically become less bothersome over a period of
weeks to months as they settle below the line of
sight. However, vitrectomy may be indicated in
a very select group of patients with visually
disabling vitreous floaters, as long as an
objective assessment of the patient's visual
dysfunction from the floaters is made. - Dr. Dan Montzka, M.D., of St. Luke's Retina
Institute in Tarpon Springs, Florida says "with
recent advances in vitrectomy techniques such as
sutureless incisions, the risks are lower than
ever in history for most types of vitreo-retinal
surgery." Dr. Montzka and his colleagues Dana M.
Deupree, M.D. and Brian Phillpotts, M.D., have
been performing the state-of-the-art, sutureless
retina surgery for the past several years.
I FLOATERS DEBILITANTI APPARTENGONO AL PASSATO
17FLOATERS ONLY VITRECTOMY
18VITREOLISI LASER
19VITREOLISI LASER
20VITREOLISI LASER
FOTODISTRUZIONE
21VITREOLISI LASER
22VITREOLISI LASER
- MIGLIORAMENTI 92 DEI CASI
- COMPLICAZIONI 0,29 DEI CASI
- (cataratta, glaucoma, distacco di retina)
PRO E CONTRO
23VITREOLISI LASER
- Department of Ophthalmology, Father Fox Memorial
Hospital, Tainan, Taiwan, Republic of China.
Sono stati esaminati quindici casi di floaters
con serie complicazioni psicologiche. Usando un
oftalmoscopio diretto, sono state rilevate le
opacità vitreali. Le opacità sono state
fotodistrutte con lo YAG laser, usando i livelli
di energia da 5 a 7,1 mj e unenergia totale da
71 a 742,0 mj. I sintomi sono spariti
completamente subito dopo il trattamento in tutti
e 15 i casi. Non ci sono state né complicazioni
durante loperazione né complicazioni
postoperatorie note durante un periodo successivo
di almeno 1 anno. A nostra conoscenza, l'uso
dello YAG laser per trattare i floaters vitreali
non è mai stato descritto precedentemente. La
nostra esperienza iniziale indica che il
trattamento è semplice, sicuro ed efficace.
ND YAG LASER E MIODESOPSIE
24VITREOLISI ENZIMATICA
Anticipation for enzymatic vitreolysis Other
applications can be envisaged. Enzymatic
vitreolysis might be useful as a supplement to
pneumatic retinopexy for rhegmatogenous retinal
detachment repair injecting an enzyme at the
time of gas injection to additionally release
vitreous traction could potentially increase the
success rate of this office based procedure. As
another example patient complaints associated
with vitreous floaters are all too familiar to
ophthalmologists, but the risk-benefit profile
for surgery for vitreous floaters is prohibitive.
Could enzymatic vitreolysis reduce risks
sufficiently to become viable for the large
number of patients with this relatively benign
but annoying visual problem? The arrival of
enzymatic vitreolysis may expand vitreoretinal
practice in ways that can't be predicted. Before
enzymatic vitreolysis enters the mainstream
central questions will need to be addressed
effectiveness, inflammatory responses, retinal
toxicity, long term complications. And years of
work in the field of vitreolytic enzymes have yet
to yield a widely accepted alternative to
mechanical vitrectomy. Nevertheless, as the
limits of conventional vitrectomy are being
approached vitreoretinal surgeons continue to
look forward over the next years to a new
generation of therapies with vitreolytic enzymes.
25IALURONIDASI
- Klin Oczna. 2002104(2)135-7.Related Articles,
Links - Efficacy of hyaluronidaze in reducing vitreous
opacites--preliminary reportArticle in
PolishPuchalska-Niedbal L, Millo B.Katedry i
Kliniki Okulistyki z Zakladem Patofizjologii
Narzadu Wzroku Pomorskiej Akademii Medycznej,
Szczecinie.The aim of the work the assessment
of hyaluronidase as reducer of floaters in
vitreus body. We present one patient with the
floaters in vitreus body treated by
subconjunctival injection with hyaluronidase.
Research work was carried out on a rabbit, which
had been given 10 subconjunctival injections of
hyaluronidaze. After treatment we noted
subjective and local improvement. By using
biochemical tests we proved, that subconjunctival
hyaluronidaze application is a good way, to
obtain an effect in the vitreous.Publication
Types - Case Reports
- PMID 12174456 PubMed - indexed for MEDLINE
26IALURONIDASI
- Invest Ophthalmol Vis Sci. 1999
Sep40(10)2173-8.Related Articles, Links - Effects of hyaluronan lyase, hyaluronidase,
and chondroitin ABC lyase on mammalian vitreous
gel.Bishop PN, McLeod D, Reardon A.Department
of Ophthalmology and Wellcome Trust Centre for
Cell-Matrix Research, School of Biological
Sciences, University of Manchester, England, UK.
paul.bishop_at_man.ac.ukPURPOSE To determine the
effects of enzymes on mammalian vitreous gel and
to thus infer the structural roles of hyaluronan
and chondroitin sulfate in the gel. METHODS The
wet weights of bovine vitreous gels were compared
before and after incubation with Streptomyces
hyaluronan lyase, chondroitin ABC lyase,
testicular hyaluronidase, or buffer alone. The
extent of hyaluronan depolymerization was
determined by chromatography and that of
chondroitin sulfate depolymerization by western
blot analysis. RESULTS After digestion with
Streptomyces hyaluronan lyase (30 U/gel), the gel
wet weight was the same as that of controls
(incubated with buffer alone) despite 94 of the
hyaluronan having been depolymerized when
digested with 100 U/gel, the gel wet weight
decreased (to 57 of original wet weight versus
86 for controls, P lt 0.001) and hyaluronan was
completely depolymerized. Chondroitin ABC lyase
digestion (0.2 U/gel) resulted in a slight
reduction in gel wet weight (90 versus 96, P
lt 0.001) and depolymerization of 88 of the
hyaluronan the presence of fully digested
chondroitin sulfate chains was established.
Digestions with 100 and 500 U/gel of testicular
hyaluronidase resulted in a decrease (P lt
0.001, both cases) in gel wet weight (53 versus
82, 100 U/gel 57, versus 86, 500 U/gel) with
75 and 97 hyaluronan depolymerization,
respectively. CONCLUSIONS Depolymerization of
all vitreous hyaluronan and of chondroitin
sulfate resulted in gel wet weight reduction but
not gel destruction. Digestion with 30 U/gel of
Streptomyces hyaluronan lyase revealed a small
pool (6) of relatively enzyme-resistant
hyaluronan that specifically contributed toward
maintaining gel wet weight.PMID 10476780
PubMed - indexed for MEDLINE
27IALURONIDASI
- Retina. 199818(1)16-22.Related Articles, Links
- Comment in
- Retina. 199818(1)1-3.
- Efficacy and safety of enzymatic posterior
vitreous detachment by intravitreal injection of
hyaluronidase.Harooni M, McMillan T, Refojo
M.Schepens Eye Research Institute, Department
of Ophthalmology, Harvard Medical School, Boston,
Massachusetts, USA.PURPOSE To investigate the
efficacy and safety of intravitreal injection of
hyaluronidase in producing liquefaction resulting
in a posterior vitreous detachment. METHODS
Fifteen young pigmented rabbits were randomized
into 3 groups that received 5 (group 1), 10
(group 2), or 20 (group 3) IU of hyaluronidase.
The fellow eyes were injected with a volumetric
equivalent dose of balanced salt solution as
control. The rabbits were followed for 9 weeks
and examined for signs of ocular and retinal
toxicity. The animals were then euthanized and
their eyes were examined histologically. RESULTS
Biomicroscopic evaluation in all but one rabbit
revealed no evidence of ocular toxicity. One
rabbit showed evidence of vitreous traction on
the retina with transient retinal elevation.
Biomicroscopically and histologically, all
rabbits in group 3 and four of five rabbits in
group 2 had evidence of a posterior vitreous
detachment. CONCLUSION Intravitreal injection of
hyaluronidase in doses of 10 IU or higher induces
posterior vitreous detachment in rabbits over a
period of 5 weeks. Intravitreal doses of 20 IU or
less do not appear to affect the biomicroscopic
morphology or function of ocular structures
adversely. Injections of hyaluronidase,
therefore, could be considered as an alternative
or adjunct to conventional mechanical
vitrectomy.PMID 9502276 PubMed - indexed for
MEDLINE
SICUREZZA ED EFFICACIA DELLA IALURONIDASI
28IALURONIDASI
- EMORAGGIE VITREALI
- RETINOPATIA DIABETICA
29MICROPLASMINA
- ThromboGenics Ltd. Announces the Initiation of
Phase II Trial of Microplasmin - Investigating New Drug for Treatment of Disorders
of the "Back of the Eye - ThromboGenics Ltd. today announced the start of a
Phase II trial evaluating recombinant
microplasmin in patients with - vitreoretinal disorders, also referred to as
diseases of the "back of the eye". Microplasmin
is a truncated form of the human protein plasmin
ThromboGenics has developed on a proprietary
basis the first stabilized and readily
manufactured form of this unique protein. - Microplasmin has the potential to simplify a
surgical procedure called vitrectomy, which is
used to treat visual conditions. Vitrectomy
involves separation of the vitreous (the gel-like
substance in the center of the eye) from the
retina, inducing a posterior vitreous detachment
(PVD), a technique considered beneficial in
patients with numerous retinal conditions,
including diabetic retinopathy and macular edema.
- The breakthrough procedure using plasmin for
induction of PVD was invented by Drs. Michael
Trese and George Williams, the founders of NuVue
Technologies, which owns exclusive rights for the
use of plasmin in ophthalmic applications. A
formal licensing agreement between ThromboGenics
and NuVue brings into a single portfolio all
intellectual property relating to plasmin-based
compounds for treatment of eye diseases. - This Phase II trial, in which the first patient
was treated in December 2004, will enroll up to
50 patients at 3 centers in the Netherlands and
Germany. The investigators for the study are
Professors Marc de Smet (Amsterdam), Arnd
Gandorfer and Anselm Kampik (Munich), and Eric
Feron (Rotterdam), Patients with vitreoretinal
disease for whom vitrectomy is indicated will be
enrolled. The trial is primarily designed to
provide valuable safety information on the use of
microplasmin in this setting, on which dose
selection for future clinical trials can be
based. Subject to interim results from this
trial, ThromboGenics plans to submit an
Investigational New Drug (IND) application to FDA
to allow for initiation of a U.S. clinical trial
with microplasmin in 2005.
VITREOCTOMIA FARMACOLOGICA
30MEDICINA TRADIZIONALE CINESE (TCM)
- FLOATERS AND THEIR TREATMENT WITH CHINESE HERBS
- by Subhuti Dharmananda, Ph.D., Director,
Institute for Traditional Medicine, Portland,
Oregon - Zhuling San(Polyporus Powder) Polyporus 30 g
Akebia 30 g Rhubarb 30 g Gardenia 30 g Cibotium
30 g Talc 30 g Polygonum 30 g Plantago seed 15 g
Red atractylodes 15 g Instructions grind the
ingredients to powder one dose is 9 grams, to be
consumed with salty water. Actions This formula
clears damp-heat of the liver/gallbladder and the
kidney/bladder it is comprised mainly of bitter
herbs of cold nature. Most of the herbs are
classified as diuretic in modern terms rhubarb
and gardenia purge the gallbladder. - Heishen Tang(Scrophularia Decoction)
Scrophularia Scute Raw rehmannia Chrysanthemum
Red peony Celosia Tribulus Instructions to grind
the ingredients in equal parts to powder. Each
dose is 12 grams, with the powder boiled in water
for a brief time and the resulting decoction
consumed. Actions These herbs clear heat from
the blood and dispel wind-heat from the eyes. - Bushen Wan(Supplement Kidney Pills) Ginseng
Acorus Hoelen Lycium Peony Cuscuta Alisma
Cistanche Instructions grind equal amounts of
these herbs to powder, mix with honey to form
pills. The quantity of the herbs to be used for
each dose is unclear. Actions This formula
nourishes the kidney and moistens the essence
31VARIA
- Am J Ophthalmol. 1956 Nov42(5)771-2.Related
Articles, Links - Use of iodo-niacin for retinal or vitreous
hemorrhages and vitreous floaters.ABRAHAMSON IA
Sr, ABRAHAMSON IA Jr.PMID 13372702 PubMed -
OLDMEDLINE for Pre1966 - S Afr Med J. 1958 Mar 1532(11)296-8.Related
Articles, Links - A surgical procedure for the relief of vitreous
opacities (floaters).BLUMENTHAL CJ.PMID
13543474 PubMed - OLDMEDLINE for Pre1966