Mama June reveals vision loss has caused her to miss family milestones (exclusive)

Mama June is getting candid about the impact her partial blindness has had on her life.

Despite the reality star's amazing weight loss transformation last year, June still faces a number of health problems, including impaired vision that she says has been a difficult challenge throughout her adult life.

"I will never get any vision back in the right eye," revealed June, who said she lost sight in her right eye before her original reality series, Here Comes Honey Boo Boo, ever aired. "[And] the left eye, it's no guarantee."

June and her 12-year-old daughter, Alana "Honey Boo Boo" Thompson, sat down with ET's Lauren Zima on Monday, and reflected on what June's vision problems have cost her.

"I have graduation and, like, so many things coming up and there is possibility that she won't be able to see me walk across the stage," Thompson said, admitting that she's somewhat scared of the potential for her mom to lose her sight all together.

40 PHOTOS
Mama June through the years
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Mama June through the years
NEW YORK, NY - JUNE 11: TV personality Mama June visits Build Series to discuss 'Mama June: From Not to Hot' at Build Studio on June 11, 2018 in New York City. (Photo by Desiree Navarro/Getty Images)
NEW YORK, NY - JUNE 11: TV personality Mama June visits Build Series to discuss 'Mama June: From Not to Hot' at Build Studio on June 11, 2018 in New York City. (Photo by Desiree Navarro/Getty Images)
NEW YORK, NY - JUNE 11: Actress Mama June and Honey Boo are seen leaving Aol Live in soho on June 11, 2018 in New York City. (Photo by Raymond Hall/GC Images)
ATLANTA, GA - MAY 23: TV personality Mama June attends the 'Growing Up Hip Hop Atlanta' premiere at Woodruff Arts Center on May 23, 2017 in Atlanta, Georgia. (Photo by Marcus Ingram/WireImage)
ATLANTA, GA - MAY 23: TV personalities Honey Boo Boo and Mama June attend the 'Growing Up Hip Hop Atlanta' premiere at Woodruff Arts Center on May 23, 2017 in Atlanta, Georgia. (Photo by Marcus Ingram/WireImage)
NEW YORK, NY - APRIL 06: Mama June appears on The Jenny McCarthy Show at SiriusXM Studios on April 6, 2017 in New York City. (Photo by Rob Kim/Getty Images)
NEW YORK, NY - APRIL 06: Mama June visits at SiriusXM Studios on April 6, 2017 in New York City. (Photo by Rob Kim/Getty Images)
NEW YORK, NY - APRIL 06: Mama June (L) and Jenny McCarthy appear at SiriusXM Studios on April 6, 2017 in New York City. (Photo by Rob Kim/Getty Images)
NEW YORK, NY - APRIL 05: (L-R) Mama June, AJ Calloway, and Honey Boo Boo pose on the set of 'Extra' on April 5, 2017 in New York City. (Photo by D Dipasupil/Getty Images for Extra)
NEW YORK, NY - APRIL 05: Mama June visits 'Extra' on April 5, 2017 in New York City. (Photo by D Dipasupil/Getty Images for Extra)
NEW YORK, NY - APRIL 05: Mama June visits 'Extra' on April 5, 2017 in New York City. (Photo by D Dipasupil/Getty Images for Extra)
NEW YORK, NY - APRIL 05: Mama June (L) and daughter Honey Boo Boo visit 'Extra' on April 5, 2017 in New York City. (Photo by D Dipasupil/Getty Images for Extra)
LOS ANGELES, CA - JANUARY 18: Honey Boo Boo and her mom Mama June along with sister Pumpkin in Beverly Hills, Ca on January 18, 2016 in Los Angeles, California. (Photo by Light Brigade/Bauer-Griffin/GC Images)
LOS ANGELES, CA - OCTOBER 15: June Shannon and Alana 'Honey Boo Boo' Thompson are sighted at The Grove on October 15, 2012 in Los Angeles, California. (Photo by Noel Vasquez/FilmMagic)
NEW YORK, NY - JULY 15: June Shannon attends the 'How To Honey Boo Boo: The Complete Guide' Book Event on July 15, 2013 in New York, New York. (Photo by Rob Kim/Getty Images)
MCLEAN, VA- July 11: Mike 'Sugar Bear' Thompson attends the 'How to Honey Boo Boo: The Complete Guide' Book Event at the Barnes and Nobles on July 11, 2013 in Mclean, Virginia. (Photo by Kris Connor/Getty Images)
UNIVERSAL CITY, CA - SEPTEMBER 09: Mike Thompson (L) and June Shannon visit 'Extra' at Universal Studios Hollywood on September 9, 2013 in Universal City, California. (Photo by Noel Vasquez/Getty Images for Extra)
ATLANTA, GA - JANUARY 05: Alana 'Honey Boo Boo' Thompson and Mama June Shannon attend the ATL Premiere Of WE Tv's 'Growing Up Hip Hop' at SCADshow on January 5, 2016 in Atlanta, Georgia. (Photo by Prince Williams/WireImage)
HOLLYWOOD, CA - NOVEMBER 19: (L-R) TV personalities Lauryn 'Pumpkin' Thompson, Mike 'Sugar Bear' Thompson, Alana 'Honey Boo Boo' Thompson and June 'Mama June' Shannon attend We tv's celebration of the premieres of 'Marriage Boot Camp Reality Stars' and 'Ex-isled' at Le Jardin on November 19, 2015 in Hollywood, California. (Photo by David Livingston/Getty Images)
LOS ANGELES, CA - OCTOBER 15: Alana 'Honey Boo Boo' Thompson and her mother June Shannon (R) visit 'Extra' at The Grove on October 15, 2012 in Los Angeles, California. (Photo by Noel Vasquez/Getty Images for Extra)
UNIVERSAL CITY, CA - SEPTEMBER 09: Mike Thompson visits 'Extra' at Universal Studios Hollywood on September 9, 2013 in Universal City, California. (Photo by Noel Vasquez/Getty Images for Extra)
NEW YORK, NY - APRIL 04: Alana Thompson aka. Honey Boo Boo and June Shannon aka. Mama June seen out in Manhattan on April 04, 2013 in New York City. (Photo by Josiah Kamau/BuzzFoto/FilmMagic)
LOS ANGELES, CA - OCTOBER 15: Alana 'Honey Boo Boo' Thompson and her mother June Shannon (L) visit 'Extra' at The Grove on October 15, 2012 in Los Angeles, California. (Photo by Noel Vasquez/Getty Images for Extra)
UNIVERSAL CITY, CA - SEPTEMBER 09: Mike Thompson (L) and June Shannon visit 'Extra' at Universal Studios Hollywood on September 9, 2013 in Universal City, California. (Photo by Noel Vasquez/Getty Images for Extra)
Mama June and Sugar Bear
Mama June and Sugar Bear
UNIVERSAL CITY, CA - SEPTEMBER 09: June Shannon visits 'Extra' at Universal Studios Hollywood on September 9, 2013 in Universal City, California. (Photo by Noel Vasquez/Getty Images for Extra)
Honey Boo Boo and family dressed as the Kardashians.
LOS ANGELES, CA - NOVEMBER 18: Mama June and Honey Boo Boo are seen at LAX on November 18, 2015 in Los Angeles, California. (Photo by GVK/Bauer-Griffin/GC Images)
Honey Boo Boo and family
THE TONIGHT SHOW STARRING JIMMY FALLON -- Episode 0073 -- Pictured: (l-r) Television personalities Mama June and Honey Boo Boo during an interview with host Jimmy Fallon on June 11, 2014 -- (Photo by: Douglas Gorenstein/NBC/NBCU Photo Bank via Getty Images)
THE TONIGHT SHOW STARRING JIMMY FALLON -- Episode 0073 -- Pictured: (l-r) Television personality Honey Boo Boo during an interview with host Jimmy Fallon on June 11, 2014 -- (Photo by: Douglas Gorenstein/NBC/NBCU Photo Bank via Getty Images)
GOOD MORNING AMERICA - Honey Boo Boo and Mama June (Here Comes Honey Boo Boo) are guests on 'Good Morning America,' 2/5/14, airing on the ABC Television Network. (Photo by Fred Lee/ABC via Getty Images) AMY ROBACH, MAMA JUNE, HONEY BOO BOO
NEW YORK, NY - JULY 15: Honey Boo Boo's mother June Shannon attends the 'How To Honey Boo Boo: The Complete Guide' Book Event on July 15, 2013 in New York, New York. (Photo by Charles Norfleet/FilmMagic)
MCLEAN, VA- July 11: June 'Mama' Shannon attends the 'How to Honey Boo Boo: The Complete Guide' Book Event at the Barnes and Nobles on July 11, 2013 in Mclean, Virginia. (Photo by Kris Connor/Getty Images)
MCLEAN, VA- July 11: Alana 'Honey Boo Boo' Thompson attends the 'How to Honey Boo Boo: The Complete Guide' Book Event at the Barnes and Nobles on July 11, 2013 in Mclean, Virginia. (Photo by Kris Connor/Getty Images)
JIMMY KIMMEL LIVE - 'Jimmy Kimmel Live' airs every weeknight, (12:00 - 1:06 a.m., ET), following 'Nightline,' packed with hilarious comedy bits and features a diverse lineup of guests including celebrities, athletes, musicians, comedians and humorous human interest subjects. The guests for MONDAY, OCTOBER 15 included actor Aziz Ansari ('Parks and Recreation'), Alana 'Honey Boo Boo' Thompson and June 'Mama' Shannon ('Here Comes Honey Boo Boo') and musical guest Josh Turner. (Photo by Richard Cartwright/ABC via Getty Images) JUNE 'MAMA' SHANNON, ALANA 'HONEY BOO BOO' THOMPSON, JIMMY KIMMEL
LOS ANGELES, CA - OCTOBER 15: Alana 'Honey Boo Boo' Thompson and her mother June Shannon (L) visit 'Extra' at The Grove on October 15, 2012 in Los Angeles, California. (Photo by Noel Vasquez/Getty Images for Extra)
Honey Boo Boo színre lép (3. évad)
MCLEAN, VA- July 11: June 'Mama' Shannon, Mike 'Sugar Bear' Thompson, Alana 'Honey Boo Boo' Thompson, Anna 'Chickadee' Shannon and Lauryn 'Pumpkin' Shannon attend the 'How to Honey Boo Boo: The Complete Guide' Book Event at the Barnes and Nobles on July 11, 2013 in Mclean, Virginia. (Photo by Kris Connor/Getty Images)
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It's a very real fear that June shares, saying that she's already missed out on some important milestones in her kids' lives, including daughter Jessica Shannon's graduation.

"When Jessica graduated college back in May, I wasn't able to see that," the 38-year-old reality star shared, getting choked up. "It's emotional for me just thinking about it."

June also revealed that one of the possibilities that upsets her the most is not being able to see her baby granddaughter, whom June's daughter Lauryn "Pumpkin" Shannon, welcomed in December.

Mama June made headlines last year when she underwent a shocking weight-loss journey that saw her drop over 300 pounds and fit into a size 4 dress as part of the docuseries Mama June: From Not to Hot.

However, in the months following her numerous medical procedures as part of the show, June has put a few pounds back on, and she's getting a lot of support from her little girl.

"It's understandable why she would gain the weight back," Thompson shared. "She's had so many surgeries in the last six months, it's totally understandable. I would gain weight if I had six surgeries in the last six months [too]."

June's battle to keep the weight off and lose what she's gained back will be the subject of the upcoming second half of season two of Mama June: From Not to Hot, which premieres June 15 at 9 p.m. ET/PT on WE tv.

12 PHOTOS
Mama June out and about since her weight loss
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Mama June out and about since her weight loss
ATLANTA, GA - JANUARY 09: (L-R) June Shannon, Alana Thompson, Lauryn 'Pumpkin' Shannon and Ella Grace Efird attend 'Growing Up Hip Hop Atlanta' season 2 premiere party at Woodruff Arts Center on January 9, 2018 in Atlanta, Georgia. (Photo by Paras Griffin/Getty Images for WEtv)
ATLANTA, GA - JANUARY 09: June Shannon, a.k.a. 'Mama June,' attends 'Growing Up Hip Hop Atlanta' season 2 premiere party at Revel on January 9, 2018 in Atlanta, Georgia. (Photo by Paras Griffin/Getty Images for WEtv)
ATLANTA, GA - JANUARY 09: June Shannon, a.k.a. 'Mama June,' attends 'Growing Up Hip Hop Atlanta' season 2 premiere party at Revel on January 9, 2018 in Atlanta, Georgia. (Photo by Paras Griffin/Getty Images for WEtv)
NEW YORK, NY - APRIL 06: Mama June visits at SiriusXM Studios on April 6, 2017 in New York City. (Photo by Rob Kim/Getty Images)
NEW YORK, NY - APRIL 06: Mama June visits at SiriusXM Studios on April 6, 2017 in New York City. (Photo by Rob Kim/Getty Images)
NEW YORK, NY - APRIL 06: Mama June (L) and Jenny McCarthy appear at SiriusXM Studios on April 6, 2017 in New York City. (Photo by Rob Kim/Getty Images)
NEW YORK, NY - APRIL 05: (L-R) Mama June, AJ Calloway, and Honey Boo Boo pose on the set of 'Extra' on April 5, 2017 in New York City. (Photo by D Dipasupil/Getty Images for Extra)
NEW YORK, NY - APRIL 05: AJ Calloway (L) and Mama June pose on the set of 'Extra' on April 5, 2017 in New York City. (Photo by D Dipasupil/Getty Images for Extra)
NEW YORK, NY - APRIL 05: Mama June visits 'Extra' on April 5, 2017 in New York City. (Photo by D Dipasupil/Getty Images for Extra)
NEW YORK, NY - APRIL 05: Mama June visits 'Extra' on April 5, 2017 in New York City. (Photo by D Dipasupil/Getty Images for Extra)
NEW YORK, NY - APRIL 05: Mama June (L) and daughter Honey Boo Boo visit 'Extra' on April 5, 2017 in New York City. (Photo by D Dipasupil/Getty Images for Extra)
NEW YORK, NY - APRIL 05: (L-R) AJ Calloway interviews Honey Boo Boo and Mama June during their visit to 'Extra' on April 5, 2017 in New York City. (Photo by D Dipasupil/Getty Images for Extra)
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