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Former Winnipegger Isaac Raber using his expertise to restore sight to young people in Rwanda
By MYRON LOVE At the end of this month, Philadelphia-based Dr. Irving (Isaac) Raber is stepping away from his 45-year career as a leading cornea disease specialist.
“I am 75,” notes the former Winnipegger. “I still feel great but I think it best to quit when I am still at the top of my game.”
However, although he is retiring from his practice, he is not putting down the tools of his trade entirely just yet.
On November 27, Raber will be boarding a plane for the 24-hour trip to Rwanda – his fourth visit to the small central African country –where he will once again be bringing with him the gift of sight to sightless young people.
A lot of young people in Rwanda suffer from an eye condition called keratoconus. he explains, an eye condition in which your cornea — the clear, dome-shaped front of your eye — gets thinner and gradually bulges outward into a cone shape. A cone-shaped cornea causes blurred vision may cause sensitivity to light and glare. Keratoconus usually affects both eyes – meaning people who have the condition can be considered legally blind.
In Rwanda, Raber works out of an eye hospital in a place called Kabgayi, which is about two hours away from Kigali, the capital.. T he hospital, operated by the Catholic Church, treats hundreds of patients from the surrounding countryside, Raber points out. While there is one full time ophthalmologist on staff, he notes, there is a long list of people who need corneal transplants.
Raber is the son of the late Edie and Sunny Raber. A Peretz School and St. John’s High School graduate, he did his basic medical degree at the University of Manitoba. After graduation in 1971, he did an internship at Toronto General Hospital followed by a residency in internal medicine at the Health Sciences Centre.
In 1975, he and his wife Donna left Winnipeg once again for Toronto, where he did a Residency in Ophthalmology at the University of Toronto, followed by a Fellowship in Corneal and External Diseases at Wills Eye Hospital in Philadelphia from 1978-1979.
Raber recalls that his interest in Ophthalmology was piqued by the eye problems that his beloved zaida, Avram Raber, was experiencing at that time. “I wanted to be able to help people see again,” he says.
From 1979-86, Raber was Chief of the Cornea Service at Scheie Eye Institute (University of Pennsylvania Department of Ophthalmology), after which, he went into private practice. He was an Attending Surgeon on the Cornea Service at Wills Eye Institute and an Assistant Clinical Professor of Ophthalmology at Thomas Jefferson University.
Seven years ago, he notes, he got to thinking that, considering that he was getting older and that his daughters, Rebecca and Leah, were finished college and out of the house, it was time he gave back.
So, in 2016, he contacted the head of Global Ophthalmology at Wills Eye Hospital about volunteering through the organization’s program and found his way to the eye hospital in Kabgayi.
“The people I have worked with and treated in Kabgayi have been wonderful,” he says. “Everyone has been appreciative and thankful.”
He describes Rwanda as a beautiful country and, despite the horrors of the past, a peaceful and safe place.
On each of his visits – in 2016, 2017 and 2019 – Raber has spent a week at the eye clinic putting in 12-hour days doing corneal transplants – and this upcoming trip will follow the same routine.
And he doesn’t just bring his skills with him. He also brings with him 25 corneas for transplant. “Each cornea costs $4,000-$5,000,” he points out. “For a non-profit hospital like the eye hospital in Kabgayi, that is a lot of money. I am able to get corneas donated by the eye bank in Philadelphia.”
How much longer Raber can continue to do the work in Rwanda is open to question. “Putting in 12-hour days at my age is difficult both mentally and physically,” he comments. “I don’t know how much longer I can do this.”
His reward, he says, is seeing the smiles on patients’ faces when they can see again. “I recently received an email from one girl I treated a few years ago,” he reports. “I am happy to say that she is in high school now and is looking forward to going to university. It is nice to know that I am making a difference.”
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Volatility, Hit Frequency, and RTP: Why the Number Casinos Advertise Is the Least Useful One
The return to player percentage looks clean as a casino data point. It gives players a neat number, usually around 94% to 97% for many online slots, and that number feels easy to compare. A 96.5% game appears better than a 95.2% game. The problem starts when players treat RTP as a forecast for their next 50 spins or one evening.
You may find the RTP listed on slot pages on a leading online casino in Ontario, but the number only tells part of the story. Two games can share the same RTP and create different sessions: one may return small wins often, while the other may drain a balance before one bonus round changes everything.
The RTP Trap
Return to player (RTP) measures the theoretical share of total wagers a game returns across a very large number of rounds. In plain terms, a 96% RTP slot returns about $96 for every $100 wagered in the long run. That does not mean one player who deposits $100 should expect $96 back.
The trap sits in the word “theoretical.” RTP comes from the game’s math model. It works across huge samples, not personal sessions. A player can finish far above that percentage, far below it, or with nothing left after a short run of poor results.
Is it useless then? No, RTP can still help. It gives a baseline cost of play. Lower-RTP games cost more on average than higher-RTP games. Still, once a game passes a reasonable threshold, the next question matters more: how does it distribute that return?
Hit Frequency: The Number That Shapes Session Feel
Hit frequency tells you how often a game produces a winning outcome. This often misleads players because any win can count. A spin that returns $0.10 on a $1 bet may still count as a hit, even though the player lost $0.90 in real terms.
A game can feel active because symbols connect often, sounds play, and the screen keeps celebrating small returns. The balance may still fall. In many modern slots, “win” does not always mean profit on the spin.
Hit frequency answers one practical question: how much silence can you tolerate? Some players dislike long dry spells. Others accept quieter sessions because they chase bonus rounds or larger payouts.
The educational site Get Gambling Facts gives a useful distinction: RTP concerns the percentage of money returned over time, while hit frequency concerns how often a machine stops on a winning combination.
Volatility: The Risk Label Players Need More Often
Volatility, also called variance, describes how unevenly a game pays. Low-volatility games tend to return smaller amounts more often. High-volatility games hold more value in rare events: bonus rounds, premium symbols, multipliers, or jackpots.
Here is where RTP becomes less useful on its own:
- A 96% low-volatility slot may give modest returns and longer play from the same balance.
- A 96% high-volatility slot may burn through funds quickly unless the player hits a strong feature.
- A progressive jackpot game may look exciting, but it often places more value on rare top prizes.
The same RTP can hide very different risk profiles. Players who ignore volatility often blame the casino or the game when the session follows its math design.
Why the Same RTP Can Feel So Different
Picture two slots with 96% RTP. Slot A pays small wins on many spins, has a modest top prize, and rarely creates dramatic balance swings. Slot B pays less often but offers a large max win and volatile bonus rounds. The advertised return matches, but the experience does not.
Slot A may suit a player who wants a slower bankroll drop and more regular feedback. Slot B suits someone who accepts sharper losses in exchange for a shot at a heavier payout.
A Better Way to Read a Slot Page
Most slot pages give players more clues than they notice. The trick is to read the details together rather than chase the highest percentage.
Start with RTP. If two games look similar, the higher number has better long-term value. Then check volatility. If the game uses terms such as high, very high, or extreme variance, lower your bet size or expect shorter sessions. Next, look at the paytable. A huge max win usually means the game saves a lot of its value for rare outcomes.
A sensible pre-play check looks like this:
- RTP: What is the average long-term return?
- Volatility: How rough can the session become?
- Hit frequency: How often will the game show any wins?
- Paytable: Where does most value sit?
To Conclude
Casinos advertise RTP because it looks objective, tidy, and easy to rank. Players should read it, but they should not give it more authority than it deserves. For long sessions, volatility may matter more than a small RTP difference. For comfort, hit frequency may explain the feel better than the payback rate.
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The Popularity of Simpler Slot Games in 2026: Review From Casino Online CrazyTower Experts
Online casinos now fill their libraries with numerous video slots that have dozens of functions, long bonus rounds, complex mechanics, and so on. Interestingly, despite this huge range of modern options, many Canadian visitors at sites like Casino Online CrazyTower here https://crazytower.com/ca/ no longer want complicated gameplay that requires constant attention and long explanations.
Simpler slots now attract a wider audience because they save time and create faster sessions. So, let’s figure out why this change happened and reasons for the popularity of simpler machines.
Why Many Players Are Returning to Basic Gameplay
Modern websites like Casino Online CrazyTower pushed complex video slots for years, but many people now prefer classic formats again. Simple gameplay has fewer interruptions and is simpler in terms of budgeting, which is important when you gamble for fun.
These are a few potential reasons explain why simpler slots became popular again in 2026:
- Faster rounds. Symbols appear quickly, and rounds continue without long animations or extended bonus sequences.
- Easier controls. Most classic slots have simple menus and familiar layouts that don’t confuse new visitors.
- Smaller feature lists. Simple slots usually have standard wilds, scatters, and multipliers instead of dozens of random mechanics.
- Better session flow. People spend more time on gameplay instead of reading explanations about symbols and special functions.
- Lower visual pressure. Simpler slots use calmer designs and shorter effects that don’t overload attention.
Classic gameplay also suits mobile devices better because shorter rounds work well on smaller screens. Plus, many visitors now prefer games that start instantly and explain their mechanics within seconds.
Features That Make Simpler Slots Appealing
Simple machines at Casino Online CrazyTower and similar websites continue to attract attention because they have a high gameplay speed. Many classic titles also replicate older casino machines that people already know from physical casinos.
However, these aren’t the only factors that attract gamblers. So, check out this list:
- Short bonus rounds. Free spins and multipliers finish quickly instead of interrupting gameplay for several minutes.
- Common and standard paylines. Traditional layouts help people understand payouts without long explanations.
- Faster loading times. Simpler graphics reduce waiting time on phones, tablets, and older computers.
- Stable gameplay pace. Long cutscenes and constant pop-up notifications don’t interrupt the session.
- Traditional themes. Fruit symbols, bars, sevens, and classic casino designs still attract large audiences.
- Smaller menus. Important information appears immediately without complicated tabs or hidden sections.
Modern video slots often contain too many mechanics in a single game. Developers now combine expanding reels, random modifiers, mission systems, tournaments, and multiple bonus levels in one title. Many visitors lose interest because gameplay turns repetitive and overloaded with constant interruptions.
Compare this to a session when you get results immediately and aren’t interrupted. These still have free spins and even mini risk games, but not as loaded as innovative titles.
Conclusion
Simple slots usually create better replay value because people understand the mechanics immediately. Common and standard gameplay doesn’t cause frustration and allows faster decisions during casino sessions.
Many classic slots also function better during short breaks because rounds finish quickly without long bonus interruptions. That’s why simpler slots became popular again at many casinos, including Casino Online CrazyTower and such.
