10/5/2018. William D. Townsend, OD, FAAO. Advanced Eye Care, Canyon, TX Adjunct Professor, UHCO

Transcription

1 William D. Townsend, OD, FAAO Advanced Eye Care, Canyon, TX Adjunct Professor, UHCO During clinic, I initially note a few small floaters that I had never noticed before No flashes of light No vision changes I mentioned this to my extern, Juan Menjivar, who wants to dilate me and examine my peripheral retinas I decline; it was a busy week My mother was in the hospital- almost died We had a bank stockholders meeting I had to get ready to speak in Canada I knew there wasn t a problem: I am bullet proof I am speaking to the New Brunswick Association of Optometrists Lectures are going great The audience is very interactive It is a perfect spring day in a beautiful, historic Canadian city I get to hang out with my friend, Dr. Diana Shechtman who is speaking on retina Things could not be better! 1

2 I start off the day in the gym with a 7 am workout Next, I work on today s lecture to finalize the content and add new information As I work, I notice a small dark spot in my OD lower temporal field What the heck, I plunge on Hit in the right eye with a tennis ball Within a year, I noted my vision in that eye was not as quite as bright Over the years, the trend continued Why? A progressive traumatic NS cataract 10 May 2007, successful cataract surgery with implantation of Alcon Toric IOL BVA without correction = 20/15 I tell Diana about my spot and express concern; she calls me a hypochondriac 1:00 pm- I start my lecture, Pain Management As I speak, I note that the grey spot is rapidly expanding upward reducing my field in the inferior field. I run into things as I deliver the lecture Otherwise normal eyes- 5 in 100,000 per year Middle age & elderly eyes-20 in 100,000 per year Highly myopic eyes- 5,000 in 100,000 Highly myopic eyes after cataract surgery- 7% 2

3 The majority of retinal detachments are rhegmatogenous (tear-induced). Virtually all retinal tears are caused by interaction between vitreous and retina. Anatomical variations in the vitreous-retinal relationship often lead to retinal tears 1. Macula 2. Optic nerve 3. Ora serrata 4. Vitreous base 5. General vitreous-retina interface Vitreous base Optic nerve Macula Blood vessels Vitreous-retinal interface strongest weakest Peripheral senile pigment degeneration Cystoid retinal degeneration Oral pearls Cobblestone (pavingstone) degeneration Non-cystic retinal tufts Congenital RPE hyperplasia Retinal white without pressure 3

4 Appearance- Peripheral areas of "'salt & pepper" hyper-hypo pigmentation; reticular form has net-like appearance Histology- RPE degeneration w/ migration of pigment Occurrence- 20% of population over 40 years of age Risk- None Differential- Retinitis pigmentosa Management- None Occurrence- 27% of adult autopsy eyes, bilateral 38% of cases, increases w/ age, inferior location most common, high myopes Risk- In retinal detachment, retina may tear at border of lesion Differential- Chorioretinal scars Mgt- None Degenerated glial tissue Vitreous traction invariably present Risk for tear depends on Location Size Degree of traction present Cystic: occur posterior to vitreous base Non-cystic: occur within vitreous base Appearance- small, thin projections of tissue that appear as grey-white dots close to ora Histology- composed of altered retinal tissue, degenerated glial tissue; base diameter usually less than.1 mm Occurrence- 72% of adults and bilateral in 50% of cases; vast majority are intrabasal Risk- low to none - small size and intrabasal location Differential- none Management- none; rarely, small benign holes are noted at their base 4

5 Appearance- flat, round pigmented lesions, usually black or dark grey, distinct borders Size- varies from small to several disc diameters. May have a surrounding area of decreased pigmentation (halo). Histology- congenital hypertrophy of RPE; cells have larger than normal melanin granules;. Occurrence- unknown; unilateral in 85% of cases Risk- none Differential- nevus, melanoma Management- rule out traction as in cystic tufts, otherwise none Appearance- flat, round pigmented lesions, usually black or dark grey, distinct borders Size- varies from small to several disc diameters. Histology- acquired (hyperplasia) increased number of RPE cells May occur at site of vitreoretinal traction Unknown- unilateral in 85% of cases Risk- none Differential- nevus, melanoma, assess for vitreoretinal traction Enclosed ora bays Meridional folds Cystic retinal tufts Zonular traction tufts Acquired peripheral retinoschisis Typical Reticular Atrophic retinal holes Operculated retinal breaks Lattice retinal degeneration Appearance- grey nodules of varying size, usually extrabasal Histology- degenerated, proliferated cystic tissue with some degree of vitreous traction 0.1 to 1 mm diam. Occurrence- 6% of patients Risk- varies depending on source Byer: 10% of all retinal detachment caused by CRT Foos: CRT cause 82% of opercula, 97% of tears Management: scleral indentation, patient education, yearly DFE Do not underestimate the potential damage! 5

6 Appearance- Usually round, occasionally elongated red areas in peripheral retina, Often w/ cuff of subretinal fluid and subclinical detachment (30%) Opercula are almost universally seen in adjacent vitreous Pigment surround common Histology- Full thickness break in retina. Caused by traction on CRT, or area of abnormal vitreoretinal traction Occurrence- 13.4% of retinal breaks, increased in frequency w/ age, most common extrabasal; 80% associated w/ PVD. Large operculated breaks associated w/ lattice degeneration & PVD are rare. Reportedly associated w/ WWP & WWOP Risk- Slight, increases w/ size Differential- Atrophic hole, retinal hemorrhage, flap tear Management- If old, asymptomatic, patient education, yearly DFE If fresh, or symptomatic, patient education, 6 week DFE. If subclinical detachment > 2 dd, refer. Occurs in two forms, typical and reticular Caused by splitting of sensory retina Found in 4% of general population & 7% of population over 40 years of age Round or ovoid in shape, Always associated w/ cystoid degeneration; advanced stage of same process Bullous lesions more prone to progression or detachment Causes absolute scotoma Appearance- Round or ovoid shape w/ inner & outer layers separated by fluid. Details of choroidal vasculature are obscured White dots on inner surface (70%) of lesions. Inner layer smooth, has white dots on inner surface (70% of lesions) Outer layer has moth-eaten, pockmarked appearance. Inner or outer layer holes occasionally seen. 6

7 Histology- Splitting of neurosensory retina in region of outer plexiform layer Inner layer is relatively thick & smooth in appearance. Supporting elements or pillars between layers at margins of lesions. Occurrence- found in.69% of eyes, Bilateral in 33%-64% of cases, most common inferior temporal quadrant (70%-82%), some studies indicate more prevalent in hyperopes. Always associated w/ cystoid degeneration; increases w/ age Appearance- Round or ovoid shape w/ inner & outer layers separated by fluid. Details of choroidal vasculature are obscured; inner layer thinner than in typical form. White dots and an arborizing pattern of white lines in inner layer; outer layer has moth-eaten, pockmarked appearance. Inner or outer layer hole more common. Histology- Splitting of neurosensory retina in region of internal limiting membrane; inner layer is relatively thin & smooth in appearance. Supporting elements or pillars between layers at margins of lesions. Occurrence- 0.95% of eyes, bilateral in 15.8% of cases: found in 1.62% of patients. Most common in inferior temporal quadrant; vast majority of lesions in temporal quadrants. Outer layer holes in 22.7% of eyes. ; increases w/ age Risk More prone to progress past equator than typical form More prone to cause retinal detachment, especially when outer layer holes are present Greatest risk is when outer and inner layer holes co-exist in same lesion 7

8 Appearance- small (<.5 dd) round red areas in peripheral retina, often w/ surrounding cuff of fluid and subclinical detachment Histology- full thickness break in retina. Occurrence- 76% of all retinal breaks, occur in 2.4%of eyes, 4% of cases, 76% found w/in lattice lesions, associated w/ meridional folds, ZTT, CRT; increased in myopes, 80% have associated subclinical detachment Risk- minimal; 7% lead to clinical detachment Differential- tractional tear, retinal hemorrhage; scleral depression Management- document, yearly DFE, refer if clinical detachment > 2 dd noted Appearance- red, U-shaped lesion w/ "horse running toward the posterior pole Cystic retinal tuft may be seen at end of flap; 25% < 1/4 dd in size Histology- full thickness retinal break w/ attached flap of retina having traction from vitreous on apex of the flap Occurrence- 10% of all retinal breaks Frequently symptomatic due to traction. Often found at posterior border of lattice, scars, CRT, enclosed ora bays, chorioretinal scars 81% occur in individuals over 40 years of age 50% in superior nasal quadrant. Risk - moderate to high because of the continuing presence of traction. Differential- atrophic hole, operculated tear, hemorrhage Management- Small (< 1/4 dd) and asymptomatic: patient education & 4 week DFE, Larger (> 1/4 dd) or symptomatic, especially if superior, or Hx detachment fellow eye: refer 8

9 Appearance Varies widely; usually parallels the ora White lines- 12%-15% Atrophic holes- 18%-43% Pigment- 83% White spots- 80% Histology- thinned area of peripheral retina with overlying lacunae of liquified vitreous, vitreous traction on margins,especially posterior Occurrence: 8%-11% of individuals Increased in myopic eyes Most 12 o clock & 6 o clock Risk 0.5% chance for detachment 30% of all detachments associated with lattice Greatest risk is large horseshoe tears Differential: pavingstone, retinal dialysis, scleral indentation is essential Management: Observe w/ annual DFE Educate on signs & symptoms Refer if breaks at margin are discovered Examine parents, siblings My macula is still on, but the detachment is progressing quickly In New Brunswick and neighboring Nova Scotia - one surgical retinologist He is out of the country on vacation My options Fly home- it will take too long Get across the border to US health care With Lil and Dwight at the helm, I head fo the border 9

10 Our local retinal specialist back in Texas, Dr. Eddie Ysasaga arranges for me to see a retinal specialist in Portland, Maine the next morning Dr. Lil Linton and her husband Dwight drive me 300 miles to Portland while I lie face down in the back seat Portland retinal surgeon Dr. Fred Miller has made reservations for us at the La Quinta across the street from his office Sometimes ignorance is bliss Macula on detachments have much better prognosis- therefore an ocular emergency I could tell from my vision that the detachment was getting close to fixation I knew exactly what was happening Fear- what will I do if I lose my vision Second guessing- I should have let Juan dilate me I am going to go through this without the physical presence of family or friends I pray a lot 7:00 am- Dr. Fred Miller is waiting at his office- he has already contacted the surgery center & has people in place He confirms the diagnosis and we discuss surgical options We decide to go with a vitrectomy, cryo, and air bubble- partly at my insistence He personally drives me to the center and we prep for surgery 9:00 am- I am ready for surgery and we head for the OR I get and IV and some Versed I am awake, but happy 10

11 Dr. Miller inserts ports through my pars plana, and performs a vitrectomy. He fills my eye with air and cryos the area around the flap tear He then performs a retinotomy to allow fluid under my retina to escape They close. I can see nothing with my right eye Now the waiting begins- I go back to the La Quinta and sleep After a night of sleeping with my head elevated, I awake, walk across the street to Dr. Miller s office The initial findings; 2 feet, BUT if I hold a near card close to my eye I can see 20/30 I celebrate with pizza! My daughter Erin flies in- she will drive me 2300 miles back to Canyon, Texas The pressure inside a commercial aircraft is roughly equivalent to an altitude of 6000 feet Rapid decline in air pressure causes the air bubble to expand causing high IOP, pain, vision loss Even going over a mountain has the same effects only more gradual The air bubble usually 1 week Final check up with Dr. Miller looks good. My retina is flat, no infection. We hit the road Along the way, I begin to watch the bubble recede- I can read signs in my upper field. 1 May 2008 we arrive in Canyon The local retinal surgeon examines me the following day and is concerned He tells me to be still and limit activity 11

12 I am back at work on a limited schedule 2:00 pm- as I examine my patient, I note a grey spot in my superior field and it makes me nervous- It is déjà vu from the opposite direction 2:30 pm- Dr. Janet Townsend informs me that now my right inferior retina is beginning to detach The retinal specialist confirms her findings and we schedule surgery for the next day Pavingstone degeneration is common in high myopes It is innocuous unless the individual has a retinal detachment Pavingstone then becomes a potential site for multiple tears to occur I had seven tears This time the bottom half of my retina is detached 7:00 am- this time the procedure will be much more invasive Dr. Antonio Aragon inserts ports through the pars plana He fills my eye with air 83% air and 17% C3F8, (octafluoropropane) the longest residing gas used in retinal surgery. Other options include air and SF6 Air- Cheap, only good in certain cases Short residence time (@ 1 week) May not be adequate for some cases Require longer tamponade SF 6 (sulfur hexafluoride) Medium residence time (@ 2-3 weeks) C3 F8 (octafluoropropane) Long residence time (@ 6-8 weeks) Longer duration reduces likelihood of failure, redetachment 12

13 Dr. Aragon positions a silicone band around my peripheral retina and tightens it to bring it in contact with RPE He then lasers the areas around the tears and closes; we are finished! I am now to lie face down for the next ten days This is no way to spend your birthday! The initial post op report is good- I can see some print if I hold it close I wear a shield at all times, only removing it to instill Vigamox, Omnipred, and Nevanac Ten days later, I can only see hand motion and my eye hurts, but I can discontinue positioning face down I am back at work, but can only see with one eye. Any procedure that requires binocular vision goes to my associates The bubble is regressing and I can see in my superior field Dr. Aragon is concerned; my eye is very inflamed The drops continue The gas bubble is gone I am now myopic, but with correction I am 20/20 But My eye is still inflamed, with significant cells and flare My pressures are going up because I use steroids every other hour. I now know what it is like to need steroids, but to be a steroid responder 13

14 My inflammation still persists, but is beginning to decrease I am on three meds for IOP, but my pressure spikes as high as 51 mm Hg I see halos around lights I get discouraged We increase the Nevanac and taper the steroid I am finally off all steroids There is no flare, shaking my head results in an amazing display of cells Leukocytes still reside in my anterior chamber blocking outflow. I take my meds; the IOP is < 30 mm Hg OCT of my nerve looks good I continue Combigan Q 12 hours & Azopt Q 8 hours I note a small area of blurring in the superior field of my LEFT eye Flashes-No Floaters- Yes Flickering of scotoma margins- Yes Generalized haze- Yes My OD wife dilated me and found a fresh inferior detachment Here we go again Vitrectomy, SF6 gas bubble, and 5 days face down = 20/20 without floaters Have to take Combigan OS for IOP Pseudophakia OU with 20/20+ vision No inflammation No medications I am blessed! 14

15 I appreciate vision more than ever before I appreciate what we as optometrists do more than ever Know the risk factors for retinal tears & detachment Know how to recognize and manage peripheral retinal conditions that pose a risk of retinal tears, detachment Take good care of your own eyes THANK YOU 15