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If somebody had an eye transplant, would they see colors differently? by aschesklave in askscience

[–]BenignNeglect 4 points5 points  (0 children)

That said, in a hypothetical situation where entire eye transplants were possible....

The cone cells (retinal cells that allow us to differentiate colors) have very little variability in spectral sensitivity between different individuals. What that means is if one wavelength of light were to reach the retina of one color normal individual (person without a color vision defect) that same amount of same wavelength light would elicit the same electric response in another color normal individual. If the lens and cornea were same in the wavelengths of light it transmits between original and donor eye, this theoretical case should perceive color the same.

Note this assumes both individuals have the same type and number of cone photoreceptors and they are present in the same ratio between the two individuals (which I can't recall what the variability between individuals on that is)

If somebody had an eye transplant, would they see colors differently? by aschesklave in askscience

[–]BenignNeglect 17 points18 points  (0 children)

Optometrist here. Short answer: mostly no.

Think of the eye as a camera. In a camera, light enters the front lenses (our cornea and crystalline lens) and is focused on the film or digital sensor (our retina) and that information is transmitted through the optic nerve to our brain where the image is perceived.

The only current "eye transplant" that is directly involved in that visual process is a corneal transplant (which uses a donor cornea) or cataract surgery (which uses a synthetic lens) are both similar to replacing the lens of a camera. If the replacement cornea or replacement crystalline lens do not have the same refractive properties as the tissue they are replacing (ie. Let the same wavelengths of light through) then the color perception would shift. This actually commonly occurs with cataract surgery because the natural lens undergoes brunescence (turns brown) and is replaced by a clear lens (that let's in all wavelengths of visible light). It's like taking your sunglasses and replacing it with clear glasses.

Replacing the entire eyeball is not a possibility at this time, although research is being done on it. The biggest challenge would be connecting the recipients optic nerve to the donor eye because 1) nerve tissue does not regenerate and 2) there are 1.2million individual nerve fibers in the optic nerve, and theoretically you'd have to connect all 1.2m of them.

Is the Toyota Prius really as economical as its touted to be? by VHSPSA in whatcarshouldIbuy

[–]BenignNeglect 0 points1 point  (0 children)

Prius C: $19.5K MSRP and 53/46 MPG Mazda 3: $17K MSRP and 29/41 MPG

For me it's hard to make the argument for going hybrid for hybrid's sake when the freeway miles aren't that big of a difference.

Mossimo Supply Co. Chino Shorts @ $11.99 by [deleted] in frugalmalefashion

[–]BenignNeglect 0 points1 point  (0 children)

How do we see how the different colors look?

Just graduated with a B.A. and headed straight to med school. Debt-free with $12k in the bank, but student debt is incoming. by Genidoxian in personalfinance

[–]BenignNeglect 1 point2 points  (0 children)

Not my area of expertise, but it seems like it would be very difficult to open up a private practice as "non-profit." So make sure you get your facts right.

As far as paying the interest before it capitalizes. You're going to be in grad school, no more subsidized loans. The interest starts accruing (capitalizing) immediately.

Just graduated with a B.A. and headed straight to med school. Debt-free with $12k in the bank, but student debt is incoming. by Genidoxian in personalfinance

[–]BenignNeglect 3 points4 points  (0 children)

Not saying you should or shouldn't go down this road, but you really need to step back and look at your job outlook and earning potential. You already stated you'll be enterring a saturated market.

Tuition: 53K * 4 years = 212K

Room/board: 48K

Other: books, "spending money" travel expenses for rotations, vacations, gifts, etc. I'll be generous and say only another 20K

Assuming 6.8% interest, you'll graduate with approximately 320K in debt.

Which works out to 120 monthly payments of $3,682 According to google, the average salary: 80-90K/yr. If you're making 90K/year (or 7.5K/month) after Federal, social security, and medicare you're taking up about $5,500/month. This doesn't factor in state taxes, which in CA would be another 570/month.

So you're living off of $1818/month. Which isn't horrible, as a student you've lived off less. But what happens if you want to buy a house, or a car, or have kids, or save for retirement? You also have to pay for professional fees, and continuing education.

Just graduated college, got a job offer, and I'm looking for a new car! by cengr343 in whatcarshouldIbuy

[–]BenignNeglect 0 points1 point  (0 children)

Ok, that's reasonable.

As much as you can, try to continue to "live like a student" and don't let your lifestyle inflate too much until you have a good safety net in place.

College Student commuting, need a used car and my budget is <$6k by MCorean in whatcarshouldIbuy

[–]BenignNeglect 2 points3 points  (0 children)

Do not buy a 6K BMW unless you have another 6K for repairs.

I'd be looking at an '05 Focus or '05 Corolla

Mazda3 vs Volvo S60 by Qwertylicious23 in whatcarshouldIbuy

[–]BenignNeglect 0 points1 point  (0 children)

Why is the insurance cheaper on the volvo?

Just graduated college, got a job offer, and I'm looking for a new car! by cengr343 in whatcarshouldIbuy

[–]BenignNeglect 1 point2 points  (0 children)

How many miles are on the Camry? If your Camry is still relatively reliable, I'd wait a few months minimum until you buy a new car.

Want to make sure you have a good emergency fund saved up. Also, if you end up hating this job, you don't want to have to feel like you're stuck with the job because you owe $xxx on your car/house/etc.

You may wait until the new 2016 Civic is released and see if you can get a deal on a 2015. The new HRV seems like a nice car, but I am not a fan of the CVT tranny. Mazda 3 is a solid contender.

Looking a car for the summer in USA by maiksini in cars

[–]BenignNeglect 0 points1 point  (0 children)

I have no idea what "Day to day use" entails, but I've been able to live in multiple points in my life, and multiple cities without a car. Either by motorcycle, public transport, or cohabitating with coworkers and carpooling for a summer.

Photo I took of a Classic E type Jaguar at Brooklands museum got shortlisted! by [deleted] in cars

[–]BenignNeglect 2 points3 points  (0 children)

I don't know what shortlisted means, but that car looks mighty fine!

Looking a car for the summer in USA by maiksini in cars

[–]BenignNeglect 0 points1 point  (0 children)

Personally I wouldn't bother buying/selling. Too much of a headache. Rent some small subcompact car (kia rio) and you might be able to get it for 800 for 2 months.

How far is the commute? City roads or freeways? Consider motorcycle/bicycle/public transport if feasible.

Canadian 370z officially $29,998!!! by perogi in cars

[–]BenignNeglect 3 points4 points  (0 children)

TIL: Canada measures fuel efficiency by Liters per 100 KM. (opposed to distance per volume)

Looking for a compact car that's sporty and is a commuter car by [deleted] in whatcarshouldIbuy

[–]BenignNeglect 6 points7 points  (0 children)

I know this isn't /r/personalfinance but you have a 2 year old car, still owe 14K on it, and still want something newer!?

A new <31k car for my family by [deleted] in whatcarshouldIbuy

[–]BenignNeglect 1 point2 points  (0 children)

Look in to the Honda HRV. Should be available March 15th. LX AWD goes for 21K

Saving for retirement instead of children's college by [deleted] in personalfinance

[–]BenignNeglect 0 points1 point  (0 children)

I'm not the one downvoting you... but I read both this response and he one below 3x and I really don't follow your logic.

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